Use contents size for android_webview layout.

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/timer/timer.h"
 #include "content/public/renderer/render_view_observer.h"
 #include "third_party/WebKit/public/web/WebPermissionClient.h"
 #include "third_party/skia/include/core/SkColor.h"
+#include "ui/gfx/size.h"
 
 namespace WebKit {
 
 class WebNode;
 class WebURL;
 
 }  // namespace WebKit
 
 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);
 
  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;
   virtual void DidCommitCompositorFrame() OVERRIDE;
+  virtual void DidUpdateLayout() OVERRIDE;
   virtual void Navigate(const GURL& url) OVERRIDE;
 
   void OnDocumentHasImagesRequest(int id);
 
   void OnDoHitTest(int view_x, int view_y);
 
   void OnSetTextZoomLevel(double zoom_level);
 
   void OnResetScrollAndScaleState();
 
   void OnSetInitialPageScale(double page_scale_factor);
   void OnSetBackgroundColor(SkColor c);
 
   void UpdatePageScaleFactor();
 
+  void OnEnableContentsSizeNotifications();
+  void CheckContentsSize();
+
   // WebKit::WebPermissionClient implementation.
   virtual bool allowDisplayingInsecureContent(
       WebKit::WebFrame* frame,
       bool enabled_per_settings,
       const WebKit::WebSecurityOrigin& origin,
       const WebKit::WebURL& url) OVERRIDE;
   virtual bool allowRunningInsecureContent(
       WebKit::WebFrame* frame,
       bool enabled_per_settings,
       const WebKit::WebSecurityOrigin& origin,
       const WebKit::WebURL& url) OVERRIDE;
 
   bool capture_picture_enabled_;
 
   float page_scale_factor_;
 
+  bool send_contents_size_updates_;
+  gfx::Size last_sent_contents_size_;
+  base::OneShotTimer<AwRenderViewExt> check_contents_size_timer_;
+
   DISALLOW_COPY_AND_ASSIGN(AwRenderViewExt);
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_RENDERER_AW_RENDER_VIEW_EXT_H_