Backport SPDY ping changes from chrome 16.

	Bug: 5524112

Backported Chrome 16 changes for SPDY Ping. The Chrome changes
are:
http://codereview.chromium.org/8036016
http://codereview.chromium.org/8230037
http://codereview.chromium.org/8319015
http://codereview.chromium.org/8330002

Also enable the SPDY protocol.

Change-Id: I2c25c19135ec1c75361d51fdbfbbbbb19f0a3098
Signed-off-by: Selim Gurun <sgurun@google.com>
diff --git a/net/tools/flip_server/spdy_interface.cc b/net/tools/flip_server/spdy_interface.cc
index 278f0dd..9ce8033 100644
--- a/net/tools/flip_server/spdy_interface.cc
+++ b/net/tools/flip_server/spdy_interface.cc
@@ -278,6 +278,17 @@
   }
 }
 
+bool SpdySM::OnControlFrameHeaderData(spdy::SpdyStreamId stream_id,
+                                      const char* header_data,
+                                      size_t len) {
+  DCHECK(false);
+  return false;
+}
+
+void SpdySM::OnDataFrameHeader(const spdy::SpdyDataFrame* frame) {
+  DCHECK(false);
+}
+
 void SpdySM::OnStreamFrameData(SpdyStreamId stream_id,
                                const char* data, size_t len) {
   VLOG(2) << ACCEPTOR_CLIENT_IDENT << "SpdySM: StreamData(" << stream_id