[ChromeDriver] Support mobile emulation on desktop Chrome.

chrome/test/chromedriver/session.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_SESSION_H_
 #define CHROME_TEST_CHROMEDRIVER_SESSION_H_
 
 #include <list>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/time/time.h"
 #include "chrome/test/chromedriver/basic_types.h"
+#include "chrome/test/chromedriver/chrome/device_metrics.h"
 #include "chrome/test/chromedriver/chrome/geoposition.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 class Chrome;
 class Status;
 class WebDriverLog;
 class WebView;
@@ skipping 35 matching lines @@
   // List of |FrameInfo|s for each frame to the current target frame from the
   // first frame element in the root document. If target frame is window.top,
   // this list will be empty.
   std::list<FrameInfo> frames;
   WebPoint mouse_position;
   base::TimeDelta implicit_wait;
   base::TimeDelta page_load_timeout;
   base::TimeDelta script_timeout;
   scoped_ptr<std::string> prompt_text;
   scoped_ptr<Geoposition> overridden_geoposition;
+  scoped_ptr<DeviceMetrics> overridden_device_metrics;
   // Logs that populate from DevTools events.
   ScopedVector<WebDriverLog> devtools_logs;
   scoped_ptr<WebDriverLog> driver_log;
   base::ScopedTempDir temp_dir;
   scoped_ptr<base::DictionaryValue> capabilities;
   bool auto_reporting_enabled;
 };
 
 Session* GetThreadLocalSession();
 
 void SetThreadLocalSession(scoped_ptr<Session> session);
 
 #endif  // CHROME_TEST_CHROMEDRIVER_SESSION_H_