Don't suppress HW compositing on the new file manager (chrome://files).

content/browser/mock_content_browser_client.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 CONTENT_BROWSER_MOCK_CONTENT_BROWSER_CLIENT_H_
 #define CONTENT_BROWSER_MOCK_CONTENT_BROWSER_CLIENT_H_
 #pragma once
 
 #include <string>
 
@@ skipping 124 matching lines @@
   virtual std::string GetWorkerProcessTitle(
       const GURL& url, content::ResourceContext* context) OVERRIDE;
   virtual void ResourceDispatcherHostCreated() OVERRIDE;
   virtual SpeechInputManagerDelegate* GetSpeechInputManagerDelegate() OVERRIDE;
   virtual ui::Clipboard* GetClipboard() OVERRIDE;
   virtual MHTMLGenerationManager* GetMHTMLGenerationManager() OVERRIDE;
   virtual net::NetLog* GetNetLog() OVERRIDE;
   virtual AccessTokenStore* CreateAccessTokenStore() OVERRIDE;
   virtual bool IsFastShutdownPossible() OVERRIDE;
   virtual void OverrideWebkitPrefs(RenderViewHost* rvh,
+                                   const GURL& url,
                                    WebPreferences* prefs) OVERRIDE;
   virtual void UpdateInspectorSetting(RenderViewHost* rvh,
                                       const std::string& key,
                                       const std::string& value) OVERRIDE;
   virtual void ClearInspectorSettings(RenderViewHost* rvh) OVERRIDE;
   virtual void BrowserURLHandlerCreated(BrowserURLHandler* handler) OVERRIDE;
   virtual void ClearCache(RenderViewHost* rvh)  OVERRIDE;
   virtual void ClearCookies(RenderViewHost* rvh)  OVERRIDE;
   virtual FilePath GetDefaultDownloadDirectory() OVERRIDE;
   virtual std::string GetDefaultDownloadName() OVERRIDE;
@@ skipping 16 matching lines @@
  private:
   // Temporary directory for GetDefaultDownloadDirectory.
   ScopedTempDir download_dir_;
 
   DISALLOW_COPY_AND_ASSIGN(MockContentBrowserClient);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_MOCK_CONTENT_BROWSER_CLIENT_H_