[Android WebView] Migrate the rendering code to a separate set of classes.

android_webview/browser/renderer_host/aw_render_view_host_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_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_
 #define ANDROID_WEBVIEW_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_
 
 #include "content/public/browser/web_contents_observer.h"
 
 #include "android_webview/common/aw_hit_test_data.h"
 #include "base/callback_forward.h"
 #include "base/threading/non_thread_safe.h"
 
 class GURL;
 
 namespace content {
 struct FrameNavigateParams;
 struct LoadCommittedDetails;
 }  // namespace content
 
 namespace android_webview {
 
 // Provides RenderViewHost wrapper functionality for sending WebView-specific
 // IPC messages to the renderer and from there to WebKit.
 class AwRenderViewHostExt : public content::WebContentsObserver,
                             public base::NonThreadSafe {
  public:
-  class Client {
-   public:
-    virtual void OnPictureUpdated(int process_id, int render_view_id) = 0;
-
-   protected:
-    virtual ~Client() {}
-  };
-
   // To send receive messages to a RenderView we take the WebContents instance,
   // as it internally handles RenderViewHost instances changing underneath us.
-  AwRenderViewHostExt(content::WebContents* contents, Client* client);
+  AwRenderViewHostExt(content::WebContents* contents);
   virtual ~AwRenderViewHostExt();
 
   // |result| will be invoked with the outcome of the request.
   typedef base::Callback<void(bool)> DocumentHasImagesResult;
   void DocumentHasImages(DocumentHasImagesResult result);
 
   // Clear all WebCore memory cache (not only for this view).
   void ClearCache();
 
   // Do a hit test at the view port coordinates and asynchronously update
   // |last_hit_test_data_|. |view_x| and |view_y| are in density independent
   // pixels used by WebKit::WebView.
   void RequestNewHitTestDataAt(int view_x, int view_y);
 
   // Optimization to avoid unnecessary Java object creation on hit test.
   bool HasNewHitTestData() const;
   void MarkHitTestDataRead();
 
   // Return |last_hit_test_data_|. Note that this is unavoidably racy;
   // the corresponding public WebView API is as well.
   const AwHitTestData& GetLastHitTestData() const;
 
-  // Enables updating picture piles on every new frame.
-  // OnPictureUpdated is called when a new picture is available,
-  // stored by renderer id in RendererPictureMap.
-  void EnableCapturePictureCallback(bool enabled);
-
-  // Captures the latest available picture pile synchronously.
-  void CapturePictureSync();
-
   // Sets the zoom level for text only. Used in layout modes other than
   // Text Autosizing.
   void SetTextZoomLevel(double level);
 
  private:
   // content::WebContentsObserver implementation.
   virtual void RenderViewGone(base::TerminationStatus status) OVERRIDE;
   virtual void DidNavigateAnyFrame(
       const content::LoadCommittedDetails& details,
       const content::FrameNavigateParams& params) OVERRIDE;
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
   void OnDocumentHasImagesResponse(int msg_id, bool has_images);
   void OnUpdateHitTestData(const AwHitTestData& hit_test_data);
   void OnPictureUpdated();
 
   bool IsRenderViewReady() const;
 
   std::map<int, DocumentHasImagesResult> pending_document_has_images_requests_;
 
   // Master copy of hit test data on the browser side. This is updated
   // as a result of DoHitTest called explicitly or when the FocusedNodeChanged
   // is called in AwRenderViewExt.
   AwHitTestData last_hit_test_data_;
 
   bool has_new_hit_test_data_;
 
-  Client* client_;
-
   DISALLOW_COPY_AND_ASSIGN(AwRenderViewHostExt);
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_RENDER_HOST_RENDER_VIEW_HOST_EXT_H_