Add a Javascript wrapper around ServiceRegistry and expose it to WebUI.

content/renderer/web_ui_mojo.h

 // Copyright 2014 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_WEB_UI_MOJO_H_
 #define CONTENT_RENDERER_WEB_UI_MOJO_H_
 
 #include <string>
 
 #include "content/public/renderer/render_frame_observer.h"
@@ skipping 12 matching lines @@
 // WebUIMojo is responsible for enabling the renderer side of mojo bindings.
 // It creates (and destroys) a WebUIMojoContextState at the appropriate times
 // and handles the necessary browser messages. WebUIMojo destroys itself when
 // the RendererView it is created with is destroyed.
 class WebUIMojo
     : public RenderViewObserver,
       public RenderViewObserverTracker<WebUIMojo> {
  public:
   explicit WebUIMojo(RenderView* render_view);
 
-  // Sets the handle to the current WebUI.
-  void SetBrowserHandle(mojo::ScopedMessagePipeHandle handle);
-
  private:
   class MainFrameObserver : public RenderFrameObserver {
    public:
     explicit MainFrameObserver(WebUIMojo* web_ui_mojo);
     virtual ~MainFrameObserver();
 
     // RenderFrameObserver overrides:
     virtual void WillReleaseScriptContext(v8::Handle<v8::Context> context,
                                           int world_id) OVERRIDE;
     virtual void DidFinishDocumentLoad() OVERRIDE;
 
    private:
     WebUIMojo* web_ui_mojo_;
 
     DISALLOW_COPY_AND_ASSIGN(MainFrameObserver);
   };
 
   virtual ~WebUIMojo();
 
   void CreateContextState();
   void DestroyContextState(v8::Handle<v8::Context> context);
 
-  // Invoked when the frame finishes loading. Invokes SetHandleOnContextState()
-  // if necessary.
+  // Invoked when the frame finishes loading. Invokes Run() on the
+  // WebUIMojoContextState.
   void OnDidFinishDocumentLoad();
 
-  // Invokes SetHandle() on the WebUIMojoContextState (if there is one).
-  void SetHandleOnContextState(mojo::ScopedMessagePipeHandle handle);
-
   WebUIMojoContextState* GetContextState();
 
   // RenderViewObserver overrides:
   virtual void DidClearWindowObject(blink::WebLocalFrame* frame) OVERRIDE;
 
   MainFrameObserver main_frame_observer_;
 
-  // Set to true in DidFinishDocumentLoad(). 'main' is only executed once this
-  // happens.
-  bool did_finish_document_load_;
-
-  // If SetBrowserHandle() is invoked before the document finishes loading the
-  // MessagePipeHandle is stored here. When the document finishes loading
-  // SetHandleOnContextState() is invoked to send the handle to the
-  // WebUIMojoContextState and ultimately the page.
-  mojo::ScopedMessagePipeHandle pending_handle_;
-
   DISALLOW_COPY_AND_ASSIGN(WebUIMojo);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_WEB_UI_MOJO_H_