Move GuestView IPCs out of ExtensionMessageFilter to GuestViewMessageFilter

extensions/browser/extension_message_filter.h

Index: extensions/browser/extension_message_filter.h
diff --git a/extensions/browser/extension_message_filter.h b/extensions/browser/extension_message_filter.h
index bfa876a116af08be8e79bea593fd15023ede2651..5a5947c2c8058031c33af063d70a9290bb2cae87 100644
--- a/extensions/browser/extension_message_filter.h
+++ b/extensions/browser/extension_message_filter.h
@@ -64,10 +64,6 @@ class ExtensionMessageFilter : public content::BrowserMessageFilter {
                                  const std::string& event_name);
   void OnExtensionAddLazyListener(const std::string& extension_id,
                                   const std::string& event_name);
-  void OnExtensionAttachGuest(int routing_id,
-                              int element_instance_id,
-                              int guest_instance_id,
-                              const base::DictionaryValue& attach_params);
   void OnExtensionCreateMimeHandlerViewGuest(int render_frame_id,
                                              const std::string& view_id,
                                              int element_instance_id,
@@ -94,13 +90,6 @@ class ExtensionMessageFilter : public content::BrowserMessageFilter {
       int routing_id,
       const ExtensionHostMsg_Request_Params& params);
 
-  // Runs on UI thread.
-  void MimeHandlerViewGuestCreatedCallback(int element_instance_id,
-                                           int embedder_render_process_id,
-                                           int embedder_render_frame_id,
-                                           const gfx::Size& element_size,
-                                           content::WebContents* web_contents);
-
   const int render_process_id_;
 
   // Should only be accessed on the UI thread.