[ChromeDriver] Support mobile emulation on desktop Chrome.

chrome/test/chromedriver/chrome/web_view_impl.h

Index: chrome/test/chromedriver/chrome/web_view_impl.h
diff --git a/chrome/test/chromedriver/chrome/web_view_impl.h b/chrome/test/chromedriver/chrome/web_view_impl.h
index df33053c03fa1e504c12a657fddf60bfb7f04424..ac0aae34e51c0d1908c57c897593e7cf19b36944 100644
--- a/chrome/test/chromedriver/chrome/web_view_impl.h
+++ b/chrome/test/chromedriver/chrome/web_view_impl.h
@@ -25,6 +25,7 @@ class DevToolsClient;
 class DomTracker;
 class FrameTracker;
 class GeolocationOverrideManager;
+class DeviceMetricsOverrideManager;
 class HeapSnapshotTaker;
 struct KeyEvent;
 struct MouseEvent;
@@ -36,6 +37,10 @@ class WebViewImpl : public WebView {
   WebViewImpl(const std::string& id,
               const BrowserInfo* browser_info,
               scoped_ptr<DevToolsClient> client);
+  WebViewImpl(const std::string& id,
+              const BrowserInfo* browser_info,
+              scoped_ptr<DevToolsClient> client,
+              DeviceMetrics* device_metrics);
   virtual ~WebViewImpl();
 
   // Overridden from WebView:
@@ -105,6 +110,7 @@ class WebViewImpl : public WebView {
   scoped_ptr<FrameTracker> frame_tracker_;
   scoped_ptr<NavigationTracker> navigation_tracker_;
   scoped_ptr<JavaScriptDialogManager> dialog_manager_;
+  scoped_ptr<DeviceMetricsOverrideManager> device_metrics_override_manager_;
   scoped_ptr<GeolocationOverrideManager> geolocation_override_manager_;
   scoped_ptr<HeapSnapshotTaker> heap_snapshot_taker_;
   scoped_ptr<DebuggerTracker> debugger_;