Browser Plugin: Add HTML5-like postMessage support

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 cf510a28fa8d559cd18b173506eaaa138dc29c0f..2674b92fa69e883f1bc5b34809db7daf7597db20 100644
--- a/content/browser/browser_plugin/browser_plugin_embedder_helper.h
+++ b/content/browser/browser_plugin/browser_plugin_embedder_helper.h
@@ -20,6 +20,7 @@ namespace gfx {
 class Size;
 }
 
+struct BrowserPluginHostMsg_PostMessage_Params;
 struct BrowserPluginHostMsg_ResizeGuest_Params;
 struct ViewHostMsg_UpdateRect_Params;
 
@@ -62,6 +63,9 @@ class BrowserPluginEmbedderHelper : public RenderViewHostObserver {
   void OnHandleInputEvent(const IPC::SyncMessage& message, bool* handled);
   void OnSetFocus(int instance_id, bool focused);
   void OnPluginDestroyed(int instance_id);
+  void OnRouteMessageEvent(int instance_id,
+                           const string16& data,
+                           const string16& target_origin);
 
   BrowserPluginEmbedder* embedder_;