Messages needed for webview compositor communication.

content/browser/browser_plugin/browser_plugin_embedder_helper.h

Index: content/browser/browser_plugin/browser_plugin_embedder_helper.h
diff --git a/content/browser/browser_plugin/browser_plugin_embedder_helper.h b/content/browser/browser_plugin/browser_plugin_embedder_helper.h
index 1b2919cb1539cfec2c8b5ca6d3aa0302bc050943..654441a9cb6f64b2034246a77f7419fa8968090f 100644
--- a/content/browser/browser_plugin/browser_plugin_embedder_helper.h
+++ b/content/browser/browser_plugin/browser_plugin_embedder_helper.h
@@ -67,6 +67,7 @@ class BrowserPluginEmbedderHelper : public RenderViewHostObserver {
       int message_id,
       const BrowserPluginHostMsg_AutoSize_Params& auto_size_params,
       const BrowserPluginHostMsg_ResizeGuest_Params& resize_guest_params);
+  void OnSwapBuffersACK(int route_id, int gpu_host_id, uint32 sync_point);
   void OnHandleInputEvent(const IPC::SyncMessage& message, bool* handled);
   void OnSetFocus(int instance_id, bool focused);
   void OnPluginDestroyed(int instance_id);