Add contentDescription for page info

 Bug: 6806384

Change-Id: Ib009a345d2dcaf5630864e8087e12194d213e174
diff --git a/res/layout/title_bar_nav.xml b/res/layout/title_bar_nav.xml
index 15568c3..2f1e0a2 100644
--- a/res/layout/title_bar_nav.xml
+++ b/res/layout/title_bar_nav.xml
@@ -46,6 +46,7 @@
             android:id="@+id/iconcombo"
             android:layout_width="44dip"
             android:layout_height="match_parent"
+            android:contentDescription="@string/page_info"
             style="@style/HoloButton">
             <ImageView
                 android:id="@+id/favicon"