Add IPC to notify BrowserPlugin when RenderProcess is ready.

content/renderer/browser_plugin/browser_plugin.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_H_
 #define CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_H_
 
 #include "third_party/WebKit/public/web/WebPlugin.h"
 
 #include <memory>
@@ skipping 136 matching lines @@
   ~BrowserPlugin() override;
 
   gfx::Rect view_rect() const { return view_rect_; }
 
   void UpdateInternalInstanceId();
 
   // IPC message handlers.
   // Please keep in alphabetical order.
   void OnAdvanceFocus(int instance_id, bool reverse);
   void OnGuestGone(int instance_id);
+  void OnGuestReady(int instance_id);
   void OnSetChildFrameSurface(int instance_id,
                               const cc::SurfaceId& surface_id,
                               const gfx::Size& frame_size,
                               float scale_factor,
                               const cc::SurfaceSequence& sequence);
   void OnSetContentsOpaque(int instance_id, bool opaque);
   void OnSetCursor(int instance_id, const WebCursor& cursor);
   void OnSetMouseLock(int instance_id, bool enable);
   void OnSetTooltipText(int browser_plugin_instance_id,
                         const base::string16& tooltip_text);
@@ skipping 37 matching lines @@
   // Weak factory used in v8 |MakeWeak| callback, since the v8 callback might
   // get called after BrowserPlugin has been destroyed.
   base::WeakPtrFactory<BrowserPlugin> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPlugin);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_H_