[ChromeDriver] Support mobile emulation on desktop Chrome.

chrome/test/chromedriver/chrome/chrome_impl.cc

 // 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.
 
 #include "chrome/test/chromedriver/chrome/chrome_impl.h"
 
 #include "chrome/test/chromedriver/chrome/devtools_client.h"
 #include "chrome/test/chromedriver/chrome/devtools_event_listener.h"
 #include "chrome/test/chromedriver/chrome/devtools_http_client.h"
 #include "chrome/test/chromedriver/chrome/status.h"
@@ skipping 65 matching lines @@
     if (!found) {
       scoped_ptr<DevToolsClient> client(
           devtools_http_client_->CreateClient(view.id));
       for (ScopedVector<DevToolsEventListener>::const_iterator listener =
                devtools_event_listeners_.begin();
            listener != devtools_event_listeners_.end(); ++listener) {
         client->AddListener(*listener);
         // OnConnected will fire when DevToolsClient connects later.
       }
       web_views_.push_back(make_linked_ptr(new WebViewImpl(
-          view.id, devtools_http_client_->browser_info(), client.Pass())));
+          view.id,
+          devtools_http_client_->browser_info(),
+          client.Pass(),
+          devtools_http_client_->device_metrics())));
     }
   }
 
   std::list<std::string> web_view_ids_tmp;
   for (WebViewList::const_iterator web_view_iter = web_views_.begin();
        web_view_iter != web_views_.end(); ++web_view_iter) {
     web_view_ids_tmp.push_back((*web_view_iter)->GetId());
   }
   web_view_ids->swap(web_view_ids_tmp);
   return Status(kOk);
@@ skipping 21 matching lines @@
       break;
     }
   }
   return Status(kOk);
 }
 
 Status ChromeImpl::ActivateWebView(const std::string& id) {
   return devtools_http_client_->ActivateWebView(id);
 }
 
+bool ChromeImpl::IsMobileEmulationEnabled() const {
+  return false;
+}
+
 Status ChromeImpl::Quit() {
   Status status = QuitImpl();
   if (status.IsOk())
     quit_ = true;
   return status;
 }
 
 ChromeImpl::ChromeImpl(
     scoped_ptr<DevToolsHttpClient> client,
     ScopedVector<DevToolsEventListener>& devtools_event_listeners,
     scoped_ptr<PortReservation> port_reservation)
     : quit_(false),
       devtools_http_client_(client.Pass()),
       port_reservation_(port_reservation.Pass()) {
   devtools_event_listeners_.swap(devtools_event_listeners);
 }