A proposal for an initial postMessage interface. This will allow JavaScript ...

webkit/plugins/ppapi/ppapi_plugin_instance.h

Index: webkit/plugins/ppapi/ppapi_plugin_instance.h
===================================================================
--- webkit/plugins/ppapi/ppapi_plugin_instance.h	(revision 77328)
+++ webkit/plugins/ppapi/ppapi_plugin_instance.h	(working copy)
@@ -53,6 +53,7 @@
 namespace ppapi {
 
 class FullscreenContainer;
+class MessageChannel;
 class ObjectVar;
 class PluginDelegate;
 class PluginModule;
@@ -84,6 +85,7 @@
 
   PluginDelegate* delegate() const { return delegate_; }
   PluginModule* module() const { return module_.get(); }
+  MessageChannel& message_channel() { return *message_channel_; }
 
   WebKit::WebPluginContainer* container() const { return container_; }
 
@@ -132,6 +134,7 @@
   bool full_frame() const { return full_frame_; }
   bool SetCursor(PP_CursorType_Dev type);
   PP_Var ExecuteScript(PP_Var script, PP_Var* exception);
+  void PostMessage(PP_Var message);
 
   // PPP_Instance pass-through.
   void Delete();
@@ -142,6 +145,7 @@
   bool HandleDocumentLoad(PPB_URLLoader_Impl* loader);
   bool HandleInputEvent(const WebKit::WebInputEvent& event,
                         WebKit::WebCursorInfo* cursor_info);
+  void HandleMessage(PP_Var message);
   PP_Var GetInstanceObject();
   void ViewChanged(const gfx::Rect& position, const gfx::Rect& clip);
 
@@ -358,6 +362,10 @@
   // True if we are in fullscreen mode. Note: it is false during the transition.
   bool fullscreen_;
 
+  // The MessageChannel used to implement bidirectional postMessage for the
+  // instance.
+  scoped_ptr<MessageChannel> message_channel_;
+
   typedef std::set<PluginObject*> PluginObjectSet;
   PluginObjectSet live_plugin_objects_;