[Chromedriver] Add Device Metrics override support to ChromeDriver via Capabilities

chrome/test/chromedriver/chrome/chrome_impl.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 CHROME_TEST_CHROMEDRIVER_CHROME_CHROME_IMPL_H_
 #define CHROME_TEST_CHROMEDRIVER_CHROME_CHROME_IMPL_H_
 
 #include <list>
 #include <string>
 
@@ skipping 19 matching lines @@
 
   // Overridden from Chrome:
   virtual ChromeDesktopImpl* GetAsDesktop() OVERRIDE;
   virtual const BrowserInfo* GetBrowserInfo() OVERRIDE;
   virtual bool HasCrashedWebView() OVERRIDE;
   virtual Status GetWebViewIds(std::list<std::string>* web_view_ids) OVERRIDE;
   virtual Status GetWebViewById(const std::string& id,
                                 WebView** web_view) OVERRIDE;
   virtual Status CloseWebView(const std::string& id) OVERRIDE;
   virtual Status ActivateWebView(const std::string& id) OVERRIDE;
+  virtual bool IsMobileEmulationEnabled() const OVERRIDE;
   virtual Status Quit() OVERRIDE;
 
  protected:
   ChromeImpl(
       scoped_ptr<DevToolsHttpClient> client,
       ScopedVector<DevToolsEventListener>& devtools_event_listeners,
       scoped_ptr<PortReservation> port_reservation);
 
   virtual Status QuitImpl() = 0;
 
   bool quit_;
   scoped_ptr<DevToolsHttpClient> devtools_http_client_;
 
  private:
   typedef std::list<linked_ptr<WebViewImpl> > WebViewList;
 
   // Web views in this list are in the same order as they are opened.
   WebViewList web_views_;
   ScopedVector<DevToolsEventListener> devtools_event_listeners_;
   scoped_ptr<PortReservation> port_reservation_;
 };
 
 #endif  // CHROME_TEST_CHROMEDRIVER_CHROME_CHROME_IMPL_H_