[Android WebView] Implement the capture picture API.

android_webview/renderer/aw_render_view_ext.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.
 
 #ifndef ANDROID_WEBVIEW_RENDERER_AW_RENDER_VIEW_EXT_H_
 #define ANDROID_WEBVIEW_RENDERER_AW_RENDER_VIEW_EXT_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 12 matching lines @@
 namespace android_webview {
 
 // Render process side of AwRenderViewHostExt, this provides cross-process
 // implementation of miscellaneous WebView functions that we need to poke
 // WebKit directly to implement (and that aren't needed in the chrome app).
 class AwRenderViewExt : public content::RenderViewObserver,
                         public WebKit::WebPermissionClient {
  public:
   static void RenderViewCreated(content::RenderView* render_view);
 
+  // Required to be public by IPC_MESSAGE_HANDLER for sync messages.
+  using content::RenderViewObserver::Send;
+
  private:
   AwRenderViewExt(content::RenderView* render_view);
   virtual ~AwRenderViewExt();
 
   // RenderView::Observer:
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
   virtual void DidCommitProvisionalLoad(WebKit::WebFrame* frame,
                                         bool is_new_navigation) OVERRIDE;
   virtual void FocusedNodeChanged(const WebKit::WebNode& node) OVERRIDE;
 
   void OnDocumentHasImagesRequest(int id);
 
   void OnDoHitTest(int view_x, int view_y);
 
   void OnEnableCapturePictureCallback(bool enable);
 
   void OnPictureUpdate(skia::RefPtr<SkPicture> picture);
 
+  void OnCapturePictureSync();
+
   // WebKit::WebPermissionClient implementation.
   virtual bool allowImage(WebKit::WebFrame* frame,
                           bool enabledPerSettings,
                           const WebKit::WebURL& imageURL) OVERRIDE;
 
   DISALLOW_COPY_AND_ASSIGN(AwRenderViewExt);
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_RENDERER_AW_RENDER_VIEW_EXT_H_