Support fullscreen for non-video elements in the WebView.

content/browser/renderer_host/render_widget_host_view_android.cc

Index: content/browser/renderer_host/render_widget_host_view_android.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_android.cc b/content/browser/renderer_host/render_widget_host_view_android.cc
index 986df1c1b512d39bb81779b31c8ced4cc1bfb0d4..d609f92ba9a1391f7d732f6add81663fb7b80f6f 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.cc
+++ b/content/browser/renderer_host/render_widget_host_view_android.cc
@@ -312,6 +312,8 @@ bool RenderWidgetHostViewAndroid::OnMessageReceived(
                         OnSetNeedsBeginFrame)
     IPC_MESSAGE_HANDLER(ViewHostMsg_SmartClipDataExtracted,
                         OnSmartClipDataExtracted)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_DidEnterFullscreen, OnDidEnterFullscreen)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_DidExitFullscreen, OnDidExitFullscreen)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
   return handled;
@@ -568,6 +570,16 @@ void RenderWidgetHostViewAndroid::SetTextSurroundingSelectionCallback(
   text_surrounding_selection_callback_ = callback;
 }
 
+void RenderWidgetHostViewAndroid::OnDidEnterFullscreen() {
+  if (content_view_core_)
+    content_view_core_->OnDidEnterFullscreen();
+}
+
+void RenderWidgetHostViewAndroid::OnDidExitFullscreen() {
+  if (content_view_core_)
+    content_view_core_->OnDidExitFullscreen();
+}
+
 void RenderWidgetHostViewAndroid::OnTextSurroundingSelectionResponse(
     const base::string16& content,
     size_t start_offset,