Add scale factor and 2x resources from webkit and plumb through to ContentClient.

webkit/tools/test_shell/test_shell_webkit_init.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 WEBKIT_TOOLS_TEST_SHELL_TEST_SHELL_WEBKIT_INIT_H_
 #define WEBKIT_TOOLS_TEST_SHELL_TEST_SHELL_WEBKIT_INIT_H_
 
 #include "base/compiler_specific.h"
 #include "base/utf_string_conversions.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebIDBFactory.h"
@@ skipping 88 matching lines @@
     return active_theme_engine_;
   }
 #endif
 
   virtual WebKit::WebSharedWorkerRepository* sharedWorkerRepository() OVERRIDE;
   virtual WebKit::WebGraphicsContext3D* createOffscreenGraphicsContext3D(
       const WebKit::WebGraphicsContext3D::Attributes& attributes);
 
   virtual string16 GetLocalizedString(int message_id) OVERRIDE;
   virtual base::StringPiece GetDataResource(int resource_id) OVERRIDE;
+  virtual base::StringPiece GetImageResource(int resource_id,
+                                             float scale_factor) OVERRIDE;
   virtual void GetPlugins(bool refresh,
                           std::vector<webkit::WebPluginInfo>* plugins) OVERRIDE;
   virtual webkit_glue::ResourceLoaderBridge* CreateResourceLoader(
       const webkit_glue::ResourceLoaderBridge::RequestInfo& request_info)
       OVERRIDE;
   virtual webkit_glue::WebSocketStreamHandleBridge* CreateWebSocketBridge(
       WebKit::WebSocketStreamHandle* handle,
       webkit_glue::WebSocketStreamHandleDelegate* delegate) OVERRIDE;
 
  private:
   scoped_ptr<webkit_glue::SimpleWebMimeRegistryImpl> mime_registry_;
   MockWebClipboardImpl mock_clipboard_;
   SimpleClipboardClient clipboard_client_;
   webkit_glue::WebClipboardImpl real_clipboard_;
   webkit_glue::WebFileUtilitiesImpl file_utilities_;
   ScopedTempDir appcache_dir_;
   SimpleAppCacheSystem appcache_system_;
   SimpleDatabaseSystem database_system_;
   SimpleDomStorageSystem dom_storage_system_;
   SimpleWebCookieJarImpl cookie_jar_;
   scoped_refptr<TestShellWebBlobRegistryImpl> blob_registry_;
   SimpleFileSystem file_system_;
 
 #if defined(OS_WIN)
   WebKit::WebThemeEngine* active_theme_engine_;
 #endif
 };
 
 #endif  // WEBKIT_TOOLS_TEST_SHELL_TEST_SHELL_WEBKIT_INIT_H_