Browser Plugin: Add HTML5-like postMessage support

content/browser/browser_plugin/browser_plugin_embedder.h

 // Copyright (c) 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.
 
 // A BrowserPluginEmbedder has a list of guests it manages.
 // In the beginning when a renderer sees one or more guests (BrowserPlugin
 // instance(s)) and there is a request to navigate to them, the WebContents for
 // that renderer creates a BrowserPluginEmbedder for itself. The
 // BrowserPluginEmbedder, in turn, manages a set of BrowserPluginGuests -- one
 // BrowserPluginGuest for each guest in the embedding WebContents. Note that
@@ skipping 86 matching lines @@
   void UpdateRectACK(int instance_id, int message_id, const gfx::Size& size);
   void SetFocus(int instance_id, bool focused);
   // Handles input events sent from the BrowserPlugin (embedder's renderer
   // process) by passing them to appropriate guest's input handler.
   void HandleInputEvent(int instance_id,
                         RenderViewHost* render_view_host,
                         const gfx::Rect& guest_rect,
                         const WebKit::WebInputEvent& event,
                         IPC::Message* reply_message);
   void PluginDestroyed(int instance_id);
+  // Called when the embedder posts a message to the guest.
+  void RouteMessageEvent(int instance_id,
+                         const string16& data,
+                         int source_frame_id,
+                         const string16& target_origin,
+                         int target_frame_id);
 
   // Overrides factory for testing. Default (NULL) value indicates regular
   // (non-test) environment.
   static void set_factory_for_testing(BrowserPluginHostFactory* factory) {
     factory_ = factory;
   }
 
  private:
   friend class TestBrowserPluginEmbedder;
 
@@ skipping 26 matching lines @@
   // Contains guests' WebContents, mapping from their instance ids.
   ContainerInstanceMap guest_web_contents_by_instance_id_;
   RenderViewHost* render_view_host_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginEmbedder);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BROWSER_PLUGIN_BROWSER_PLUGIN_EMBEDDER_H_