Browser Plugin: Add HTML5-like postMessage support

content/renderer/browser_plugin/browser_plugin.h

Index: content/renderer/browser_plugin/browser_plugin.h
diff --git a/content/renderer/browser_plugin/browser_plugin.h b/content/renderer/browser_plugin/browser_plugin.h
index 2d3d45116a5eb54545a6d05aa8dc90ad9f738441..9dbed8d71f9d80115552e9b0ae04524a79e5a2de 100644
--- a/content/renderer/browser_plugin/browser_plugin.h
+++ b/content/renderer/browser_plugin/browser_plugin.h
@@ -36,6 +36,8 @@ class CONTENT_EXPORT BrowserPlugin :
   // Set the src attribute value of the BrowserPlugin instance and reset
   // the guest_crashed_ flag.
   void SetSrcAttribute(const std::string& src);
+  // Get the guest's DOMWindow proxy.
+  NPObject* GetContentWindow() const;
   // Returns Chrome's process ID for the current guest.
   int process_id() const { return process_id_; }
   // The partition identifier string is stored as UTF-8.
@@ -57,6 +59,14 @@ class CONTENT_EXPORT BrowserPlugin :
   // Tells the BrowserPlugin to advance the focus to the next (or previous)
   // element.
   void AdvanceFocus(bool reverse);
+  // Inform the BrowserPlugin of a message posted from its guest.
+  void ReceiveMessage(int source_routing_id,
+                      const string16& source_origin,
+                      int source_frame_id,
+                      const string16& data);
+  // Inform the BrowserPlugin that the guest's contentWindow is ready,
+  // and provide it with a routing ID to grab it.
+  void GuestContentWindowReady(int guest_routing_id);
 
   // Informs the BrowserPlugin that the guest has started/stopped accepting
   // touch events.
@@ -181,6 +191,7 @@ class CONTENT_EXPORT BrowserPlugin :
   int process_id_;
   std::string storage_partition_id_;
   bool persist_storage_;
+  int guest_routing_id_;
   typedef std::vector<v8::Persistent<v8::Function> > EventListeners;
   typedef std::map<std::string, EventListeners> EventListenerMap;
   EventListenerMap event_listener_map_;