chrome/browser/file_select_helper.cc - platform/external/chromium - Git at Google

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include "chrome/browser/file_select_helper.h"

 #include <string>

 #include "base/file_util.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/browser/child_process_security_policy.h"
 #include "content/browser/renderer_host/render_process_host.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/render_widget_host_view.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "content/common/notification_details.h"
 #include "content/common/notification_source.h"
 #include "content/common/view_messages.h"
 #include "grit/generated_resources.h"
 #include "net/base/mime_util.h"
 #include "ui/base/l10n/l10n_util.h"

 namespace {

 // There is only one file-selection happening at any given time,
 // so we allocate an enumeration ID for that purpose.  All IDs from
 // the renderer must start at 0 and increase.
 static const int kFileSelectEnumerationId = -1;
 }

 struct FileSelectHelper::ActiveDirectoryEnumeration {
   ActiveDirectoryEnumeration() {}

   scoped_ptr<DirectoryListerDispatchDelegate> delegate_;
   scoped_refptr<net::DirectoryLister> lister_;
   RenderViewHost* rvh_;
   std::vector<FilePath> results_;
 };

 FileSelectHelper::FileSelectHelper(Profile* profile)
     : profile_(profile),
       render_view_host_(NULL),
       select_file_dialog_(),
       dialog_type_(SelectFileDialog::SELECT_OPEN_FILE) {
 }

 FileSelectHelper::~FileSelectHelper() {
   // There may be pending file dialogs, we need to tell them that we've gone
   // away so they don't try and call back to us.
   if (select_file_dialog_.get())
     select_file_dialog_->ListenerDestroyed();

   // Stop any pending directory enumeration, prevent a callback, and free
   // allocated memory.
   std::map<int, ActiveDirectoryEnumeration*>::iterator iter;
   for (iter = directory_enumerations_.begin();
        iter != directory_enumerations_.end();
        ++iter) {
     if (iter->second->lister_.get()) {
       iter->second->lister_->set_delegate(NULL);
       iter->second->lister_->Cancel();
     }
     delete iter->second;
   }
 }

 void FileSelectHelper::FileSelected(const FilePath& path,
                                     int index, void* params) {
   if (!render_view_host_)
     return;

   profile_->set_last_selected_directory(path.DirName());

   if (dialog_type_ == SelectFileDialog::SELECT_FOLDER) {
     StartNewEnumeration(path, kFileSelectEnumerationId, render_view_host_);
     return;
   }

   std::vector<FilePath> files;
   files.push_back(path);
   render_view_host_->FilesSelectedInChooser(files);
   // We are done with this showing of the dialog.
   render_view_host_ = NULL;
 }

 void FileSelectHelper::MultiFilesSelected(const std::vector<FilePath>& files,
                                           void* params) {
   if (!files.empty())
     profile_->set_last_selected_directory(files[0].DirName());
   if (!render_view_host_)
     return;

   render_view_host_->FilesSelectedInChooser(files);
   // We are done with this showing of the dialog.
   render_view_host_ = NULL;
 }

 void FileSelectHelper::FileSelectionCanceled(void* params) {
   if (!render_view_host_)
     return;

   // If the user cancels choosing a file to upload we pass back an
   // empty vector.
   render_view_host_->FilesSelectedInChooser(std::vector<FilePath>());

   // We are done with this showing of the dialog.
   render_view_host_ = NULL;
 }

 void FileSelectHelper::StartNewEnumeration(const FilePath& path,
                                            int request_id,
                                            RenderViewHost* render_view_host) {
   scoped_ptr<ActiveDirectoryEnumeration> entry(new ActiveDirectoryEnumeration);
   entry->rvh_ = render_view_host;
   entry->delegate_.reset(new DirectoryListerDispatchDelegate(this, request_id));
   entry->lister_ = new net::DirectoryLister(path,
                                             true,
                                             net::DirectoryLister::NO_SORT,
                                             entry->delegate_.get());
   if (!entry->lister_->Start()) {
     if (request_id == kFileSelectEnumerationId)
       FileSelectionCanceled(NULL);
     else
       render_view_host->DirectoryEnumerationFinished(request_id,
                                                      entry->results_);
   } else {
     directory_enumerations_[request_id] = entry.release();
   }
 }

 void FileSelectHelper::OnListFile(
     int id,
     const net::DirectoryLister::DirectoryListerData& data) {
   ActiveDirectoryEnumeration* entry = directory_enumerations_[id];

   // Directory upload returns directories via a "." file, so that
   // empty directories are included.  This util call just checks
   // the flags in the structure; there's no file I/O going on.
   if (file_util::FileEnumerator::IsDirectory(data.info))
     entry->results_.push_back(data.path.Append(FILE_PATH_LITERAL(".")));
   else
     entry->results_.push_back(data.path);
 }

 void FileSelectHelper::OnListDone(int id, int error) {
   // This entry needs to be cleaned up when this function is done.
   scoped_ptr<ActiveDirectoryEnumeration> entry(directory_enumerations_[id]);
   directory_enumerations_.erase(id);
   if (!entry->rvh_)
     return;
   if (error) {
     FileSelectionCanceled(NULL);
     return;
   }
   if (id == kFileSelectEnumerationId)
     entry->rvh_->FilesSelectedInChooser(entry->results_);
   else
     entry->rvh_->DirectoryEnumerationFinished(id, entry->results_);
 }

 SelectFileDialog::FileTypeInfo* FileSelectHelper::GetFileTypesFromAcceptType(
     const string16& accept_types) {
   if (accept_types.empty())
     return NULL;

   // Split the accept-type string on commas.
   std::vector<string16> mime_types;
   base::SplitStringUsingSubstr(accept_types, ASCIIToUTF16(","), &mime_types);
   if (mime_types.empty())
     return NULL;

   // Create FileTypeInfo and pre-allocate for the first extension list.
   scoped_ptr<SelectFileDialog::FileTypeInfo> file_type(
       new SelectFileDialog::FileTypeInfo());
   file_type->include_all_files = true;
   file_type->extensions.resize(1);
   std::vector<FilePath::StringType>* extensions = &file_type->extensions.back();

   // Find the correspondinge extensions.
   int valid_type_count = 0;
   int description_id = 0;
   for (size_t i = 0; i < mime_types.size(); ++i) {
     string16 mime_type = mime_types[i];
     std::string ascii_mime_type = StringToLowerASCII(UTF16ToASCII(mime_type));

     TrimWhitespace(ascii_mime_type, TRIM_ALL, &ascii_mime_type);
     if (ascii_mime_type.empty())
       continue;

     size_t old_extension_size = extensions->size();
     if (ascii_mime_type == "image/*") {
       description_id = IDS_IMAGE_FILES;
       net::GetImageExtensions(extensions);
     } else if (ascii_mime_type == "audio/*") {
       description_id = IDS_AUDIO_FILES;
       net::GetAudioExtensions(extensions);
     } else if (ascii_mime_type == "video/*") {
       description_id = IDS_VIDEO_FILES;
       net::GetVideoExtensions(extensions);
     } else {
       net::GetExtensionsForMimeType(ascii_mime_type, extensions);
     }

     if (extensions->size() > old_extension_size)
       valid_type_count++;
   }

   // If no valid extension is added, bail out.
   if (valid_type_count == 0)
     return NULL;

   // Use a generic description "Custom Files" if either of the following is
   // true:
   // 1) There're multiple types specified, like "audio/*,video/*"
   // 2) There're multiple extensions for a MIME type without parameter, like
   //    "ehtml,shtml,htm,html" for "text/html". On Windows, the select file
   //    dialog uses the first extension in the list to form the description,
   //    like "EHTML Files". This is not what we want.
   if (valid_type_count > 1 ||
       (valid_type_count == 1 && description_id == 0 && extensions->size() > 1))
     description_id = IDS_CUSTOM_FILES;

   if (description_id) {
     file_type->extension_description_overrides.push_back(
         l10n_util::GetStringUTF16(description_id));
   }

   return file_type.release();
 }

 void FileSelectHelper::RunFileChooser(
     RenderViewHost* render_view_host,
     TabContents* tab_contents,
     const ViewHostMsg_RunFileChooser_Params& params) {
   DCHECK(!render_view_host_);
   render_view_host_ = render_view_host;
   notification_registrar_.RemoveAll();
   notification_registrar_.Add(this,
                               NotificationType::RENDER_WIDGET_HOST_DESTROYED,
                               Source<RenderViewHost>(render_view_host));

   if (!select_file_dialog_.get())
     select_file_dialog_ = SelectFileDialog::Create(this);

   switch (params.mode) {
     case ViewHostMsg_RunFileChooser_Mode::Open:
       dialog_type_ = SelectFileDialog::SELECT_OPEN_FILE;
       break;
     case ViewHostMsg_RunFileChooser_Mode::OpenMultiple:
       dialog_type_ = SelectFileDialog::SELECT_OPEN_MULTI_FILE;
       break;
     case ViewHostMsg_RunFileChooser_Mode::OpenFolder:
       dialog_type_ = SelectFileDialog::SELECT_FOLDER;
       break;
     case ViewHostMsg_RunFileChooser_Mode::Save:
       dialog_type_ = SelectFileDialog::SELECT_SAVEAS_FILE;
       break;
     default:
       dialog_type_ = SelectFileDialog::SELECT_OPEN_FILE;  // Prevent warning.
       NOTREACHED();
   }
   scoped_ptr<SelectFileDialog::FileTypeInfo> file_types(
       GetFileTypesFromAcceptType(params.accept_types));
   FilePath default_file_name = params.default_file_name;
   if (default_file_name.empty())
     default_file_name = profile_->last_selected_directory();

   gfx::NativeWindow owning_window =
       platform_util::GetTopLevel(render_view_host_->view()->GetNativeView());

   select_file_dialog_->SelectFile(dialog_type_,
                                   params.title,
                                   default_file_name,
                                   file_types.get(),
                                   file_types.get() ? 1 : 0,  // 1-based index.
                                   FILE_PATH_LITERAL(""),
                                   tab_contents,
                                   owning_window,
                                   NULL);
 }

 void FileSelectHelper::EnumerateDirectory(int request_id,
                                           RenderViewHost* render_view_host,
                                           const FilePath& path) {
   DCHECK_NE(kFileSelectEnumerationId, request_id);
   StartNewEnumeration(path, request_id, render_view_host);
 }

 void FileSelectHelper::Observe(NotificationType type,
                                const NotificationSource& source,
                                const NotificationDetails& details) {
   DCHECK(type == NotificationType::RENDER_WIDGET_HOST_DESTROYED);
   DCHECK(Details<RenderViewHost>(details).ptr() == render_view_host_);
   render_view_host_ = NULL;
 }

 FileSelectObserver::FileSelectObserver(TabContents* tab_contents)
     : TabContentsObserver(tab_contents) {
 }

 FileSelectObserver::~FileSelectObserver() {
 }

 bool FileSelectObserver::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(FileSelectObserver, message)
     IPC_MESSAGE_HANDLER(ViewHostMsg_RunFileChooser, OnRunFileChooser)
     IPC_MESSAGE_HANDLER(ViewHostMsg_EnumerateDirectory, OnEnumerateDirectory)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()

   return handled;
 }

 void FileSelectObserver::OnRunFileChooser(
     const ViewHostMsg_RunFileChooser_Params& params) {
   if (!file_select_helper_.get())
     file_select_helper_.reset(new FileSelectHelper(tab_contents()->profile()));
   file_select_helper_->RunFileChooser(tab_contents()->render_view_host(),
                                       tab_contents(),
                                       params);
 }

 void FileSelectObserver::OnEnumerateDirectory(int request_id,
                                               const FilePath& path) {
   ChildProcessSecurityPolicy* policy =
       ChildProcessSecurityPolicy::GetInstance();
   if (!policy->CanReadDirectory(
           tab_contents()->render_view_host()->process()->id(),
           path)) {
     return;
   }

   if (!file_select_helper_.get())
     file_select_helper_.reset(new FileSelectHelper(tab_contents()->profile()));
   file_select_helper_->EnumerateDirectory(request_id,
                                           tab_contents()->render_view_host(),
                                           path);
 }
	// Copyright (c) 2011 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#include "chrome/browser/file_select_helper.h"

	#include <string>

	#include "base/file_util.h"
	#include "base/string_split.h"
	#include "base/string_util.h"
	#include "base/utf_string_conversions.h"
	#include "chrome/browser/platform_util.h"
	#include "chrome/browser/profiles/profile.h"
	#include "content/browser/child_process_security_policy.h"
	#include "content/browser/renderer_host/render_process_host.h"
	#include "content/browser/renderer_host/render_view_host.h"
	#include "content/browser/renderer_host/render_widget_host_view.h"
	#include "content/browser/tab_contents/tab_contents.h"
	#include "chrome/browser/ui/browser.h"
	#include "chrome/browser/ui/browser_list.h"
	#include "content/common/notification_details.h"
	#include "content/common/notification_source.h"
	#include "content/common/view_messages.h"
	#include "grit/generated_resources.h"
	#include "net/base/mime_util.h"
	#include "ui/base/l10n/l10n_util.h"

	namespace {

	// There is only one file-selection happening at any given time,
	// so we allocate an enumeration ID for that purpose. All IDs from
	// the renderer must start at 0 and increase.
	static const int kFileSelectEnumerationId = -1;
	}

	struct FileSelectHelper::ActiveDirectoryEnumeration {
	ActiveDirectoryEnumeration() {}

	scoped_ptr<DirectoryListerDispatchDelegate> delegate_;
	scoped_refptr<net::DirectoryLister> lister_;
	RenderViewHost* rvh_;
	std::vector<FilePath> results_;
	};

	FileSelectHelper::FileSelectHelper(Profile* profile)
	: profile_(profile),
	render_view_host_(NULL),
	select_file_dialog_(),
	dialog_type_(SelectFileDialog::SELECT_OPEN_FILE) {
	}

	FileSelectHelper::~FileSelectHelper() {
	// There may be pending file dialogs, we need to tell them that we've gone
	// away so they don't try and call back to us.
	if (select_file_dialog_.get())
	select_file_dialog_->ListenerDestroyed();

	// Stop any pending directory enumeration, prevent a callback, and free
	// allocated memory.
	std::map<int, ActiveDirectoryEnumeration*>::iterator iter;
	for (iter = directory_enumerations_.begin();
	iter != directory_enumerations_.end();
	++iter) {
	if (iter->second->lister_.get()) {
	iter->second->lister_->set_delegate(NULL);
	iter->second->lister_->Cancel();
	}
	delete iter->second;
	}
	}

	void FileSelectHelper::FileSelected(const FilePath& path,
	int index, void* params) {
	if (!render_view_host_)
	return;

	profile_->set_last_selected_directory(path.DirName());

	if (dialog_type_ == SelectFileDialog::SELECT_FOLDER) {
	StartNewEnumeration(path, kFileSelectEnumerationId, render_view_host_);
	return;
	}

	std::vector<FilePath> files;
	files.push_back(path);
	render_view_host_->FilesSelectedInChooser(files);
	// We are done with this showing of the dialog.
	render_view_host_ = NULL;
	}

	void FileSelectHelper::MultiFilesSelected(const std::vector<FilePath>& files,
	void* params) {
	if (!files.empty())
	profile_->set_last_selected_directory(files[0].DirName());
	if (!render_view_host_)
	return;

	render_view_host_->FilesSelectedInChooser(files);
	// We are done with this showing of the dialog.
	render_view_host_ = NULL;
	}

	void FileSelectHelper::FileSelectionCanceled(void* params) {
	if (!render_view_host_)
	return;

	// If the user cancels choosing a file to upload we pass back an
	// empty vector.
	render_view_host_->FilesSelectedInChooser(std::vector<FilePath>());

	// We are done with this showing of the dialog.
	render_view_host_ = NULL;
	}

	void FileSelectHelper::StartNewEnumeration(const FilePath& path,
	int request_id,
	RenderViewHost* render_view_host) {
	scoped_ptr<ActiveDirectoryEnumeration> entry(new ActiveDirectoryEnumeration);
	entry->rvh_ = render_view_host;
	entry->delegate_.reset(new DirectoryListerDispatchDelegate(this, request_id));
	entry->lister_ = new net::DirectoryLister(path,
	true,
	net::DirectoryLister::NO_SORT,
	entry->delegate_.get());
	if (!entry->lister_->Start()) {
	if (request_id == kFileSelectEnumerationId)
	FileSelectionCanceled(NULL);
	else
	render_view_host->DirectoryEnumerationFinished(request_id,
	entry->results_);
	} else {
	directory_enumerations_[request_id] = entry.release();
	}
	}

	void FileSelectHelper::OnListFile(
	int id,
	const net::DirectoryLister::DirectoryListerData& data) {
	ActiveDirectoryEnumeration* entry = directory_enumerations_[id];

	// Directory upload returns directories via a "." file, so that
	// empty directories are included. This util call just checks
	// the flags in the structure; there's no file I/O going on.
	if (file_util::FileEnumerator::IsDirectory(data.info))
	entry->results_.push_back(data.path.Append(FILE_PATH_LITERAL(".")));
	else
	entry->results_.push_back(data.path);
	}

	void FileSelectHelper::OnListDone(int id, int error) {
	// This entry needs to be cleaned up when this function is done.
	scoped_ptr<ActiveDirectoryEnumeration> entry(directory_enumerations_[id]);
	directory_enumerations_.erase(id);
	if (!entry->rvh_)
	return;
	if (error) {
	FileSelectionCanceled(NULL);
	return;
	}
	if (id == kFileSelectEnumerationId)
	entry->rvh_->FilesSelectedInChooser(entry->results_);
	else
	entry->rvh_->DirectoryEnumerationFinished(id, entry->results_);
	}

	SelectFileDialog::FileTypeInfo* FileSelectHelper::GetFileTypesFromAcceptType(
	const string16& accept_types) {
	if (accept_types.empty())
	return NULL;

	// Split the accept-type string on commas.
	std::vector<string16> mime_types;
	base::SplitStringUsingSubstr(accept_types, ASCIIToUTF16(","), &mime_types);
	if (mime_types.empty())
	return NULL;

	// Create FileTypeInfo and pre-allocate for the first extension list.
	scoped_ptr<SelectFileDialog::FileTypeInfo> file_type(
	new SelectFileDialog::FileTypeInfo());
	file_type->include_all_files = true;
	file_type->extensions.resize(1);
	std::vector<FilePath::StringType>* extensions = &file_type->extensions.back();

	// Find the correspondinge extensions.
	int valid_type_count = 0;
	int description_id = 0;
	for (size_t i = 0; i < mime_types.size(); ++i) {
	string16 mime_type = mime_types[i];
	std::string ascii_mime_type = StringToLowerASCII(UTF16ToASCII(mime_type));

	TrimWhitespace(ascii_mime_type, TRIM_ALL, &ascii_mime_type);
	if (ascii_mime_type.empty())
	continue;

	size_t old_extension_size = extensions->size();
	if (ascii_mime_type == "image/*") {
	description_id = IDS_IMAGE_FILES;
	net::GetImageExtensions(extensions);
	} else if (ascii_mime_type == "audio/*") {
	description_id = IDS_AUDIO_FILES;
	net::GetAudioExtensions(extensions);
	} else if (ascii_mime_type == "video/*") {
	description_id = IDS_VIDEO_FILES;
	net::GetVideoExtensions(extensions);
	} else {
	net::GetExtensionsForMimeType(ascii_mime_type, extensions);
	}

	if (extensions->size() > old_extension_size)
	valid_type_count++;
	}

	// If no valid extension is added, bail out.
	if (valid_type_count == 0)
	return NULL;

	// Use a generic description "Custom Files" if either of the following is
	// true:
	// 1) There're multiple types specified, like "audio/,video/"
	// 2) There're multiple extensions for a MIME type without parameter, like
	// "ehtml,shtml,htm,html" for "text/html". On Windows, the select file
	// dialog uses the first extension in the list to form the description,
	// like "EHTML Files". This is not what we want.
	if (valid_type_count > 1 \|\|
	(valid_type_count == 1 && description_id == 0 && extensions->size() > 1))
	description_id = IDS_CUSTOM_FILES;

	if (description_id) {
	file_type->extension_description_overrides.push_back(
	l10n_util::GetStringUTF16(description_id));
	}

	return file_type.release();
	}

	void FileSelectHelper::RunFileChooser(
	RenderViewHost* render_view_host,
	TabContents* tab_contents,
	const ViewHostMsg_RunFileChooser_Params& params) {
	DCHECK(!render_view_host_);
	render_view_host_ = render_view_host;
	notification_registrar_.RemoveAll();
	notification_registrar_.Add(this,
	NotificationType::RENDER_WIDGET_HOST_DESTROYED,
	Source<RenderViewHost>(render_view_host));

	if (!select_file_dialog_.get())
	select_file_dialog_ = SelectFileDialog::Create(this);

	switch (params.mode) {
	case ViewHostMsg_RunFileChooser_Mode::Open:
	dialog_type_ = SelectFileDialog::SELECT_OPEN_FILE;
	break;
	case ViewHostMsg_RunFileChooser_Mode::OpenMultiple:
	dialog_type_ = SelectFileDialog::SELECT_OPEN_MULTI_FILE;
	break;
	case ViewHostMsg_RunFileChooser_Mode::OpenFolder:
	dialog_type_ = SelectFileDialog::SELECT_FOLDER;
	break;
	case ViewHostMsg_RunFileChooser_Mode::Save:
	dialog_type_ = SelectFileDialog::SELECT_SAVEAS_FILE;
	break;
	default:
	dialog_type_ = SelectFileDialog::SELECT_OPEN_FILE; // Prevent warning.
	NOTREACHED();
	}
	scoped_ptr<SelectFileDialog::FileTypeInfo> file_types(
	GetFileTypesFromAcceptType(params.accept_types));
	FilePath default_file_name = params.default_file_name;
	if (default_file_name.empty())
	default_file_name = profile_->last_selected_directory();

	gfx::NativeWindow owning_window =
	platform_util::GetTopLevel(render_view_host_->view()->GetNativeView());

	select_file_dialog_->SelectFile(dialog_type_,
	params.title,
	default_file_name,
	file_types.get(),
	file_types.get() ? 1 : 0, // 1-based index.
	FILE_PATH_LITERAL(""),
	tab_contents,
	owning_window,
	NULL);
	}

	void FileSelectHelper::EnumerateDirectory(int request_id,
	RenderViewHost* render_view_host,
	const FilePath& path) {
	DCHECK_NE(kFileSelectEnumerationId, request_id);
	StartNewEnumeration(path, request_id, render_view_host);
	}

	void FileSelectHelper::Observe(NotificationType type,
	const NotificationSource& source,
	const NotificationDetails& details) {
	DCHECK(type == NotificationType::RENDER_WIDGET_HOST_DESTROYED);
	DCHECK(Details<RenderViewHost>(details).ptr() == render_view_host_);
	render_view_host_ = NULL;
	}

	FileSelectObserver::FileSelectObserver(TabContents* tab_contents)
	: TabContentsObserver(tab_contents) {
	}

	FileSelectObserver::~FileSelectObserver() {
	}

	bool FileSelectObserver::OnMessageReceived(const IPC::Message& message) {
	bool handled = true;
	IPC_BEGIN_MESSAGE_MAP(FileSelectObserver, message)
	IPC_MESSAGE_HANDLER(ViewHostMsg_RunFileChooser, OnRunFileChooser)
	IPC_MESSAGE_HANDLER(ViewHostMsg_EnumerateDirectory, OnEnumerateDirectory)
	IPC_MESSAGE_UNHANDLED(handled = false)
	IPC_END_MESSAGE_MAP()

	return handled;
	}

	void FileSelectObserver::OnRunFileChooser(
	const ViewHostMsg_RunFileChooser_Params& params) {
	if (!file_select_helper_.get())
	file_select_helper_.reset(new FileSelectHelper(tab_contents()->profile()));
	file_select_helper_->RunFileChooser(tab_contents()->render_view_host(),
	tab_contents(),
	params);
	}

	void FileSelectObserver::OnEnumerateDirectory(int request_id,
	const FilePath& path) {
	ChildProcessSecurityPolicy* policy =
	ChildProcessSecurityPolicy::GetInstance();
	if (!policy->CanReadDirectory(
	tab_contents()->render_view_host()->process()->id(),
	path)) {
	return;
	}

	if (!file_select_helper_.get())
	file_select_helper_.reset(new FileSelectHelper(tab_contents()->profile()));
	file_select_helper_->EnumerateDirectory(request_id,
	tab_contents()->render_view_host(),
	path);
	}