[ChromeDriver] Support mobile emulation on desktop Chrome.

chrome/test/chromedriver/chrome/web_view_impl.cc

Index: chrome/test/chromedriver/chrome/web_view_impl.cc
diff --git a/chrome/test/chromedriver/chrome/web_view_impl.cc b/chrome/test/chromedriver/chrome/web_view_impl.cc
index 052ceb45b8fe886bbe7d2d459ca5a78d468b63da..0175860a8224c09ebf9060f059be43f10abd89cf 100644
--- a/chrome/test/chromedriver/chrome/web_view_impl.cc
+++ b/chrome/test/chromedriver/chrome/web_view_impl.cc
@@ -14,6 +14,7 @@
 #include "base/time/time.h"
 #include "base/values.h"
 #include "chrome/test/chromedriver/chrome/debugger_tracker.h"
+#include "chrome/test/chromedriver/chrome/device_metrics_override_manager.h"
 #include "chrome/test/chromedriver/chrome/devtools_client_impl.h"
 #include "chrome/test/chromedriver/chrome/dom_tracker.h"
 #include "chrome/test/chromedriver/chrome/frame_tracker.h"
@@ -114,13 +115,16 @@ const char* GetAsString(KeyEventType type) {
 
 WebViewImpl::WebViewImpl(const std::string& id,
                          const BrowserInfo* browser_info,
-                         scoped_ptr<DevToolsClient> client)
+                         scoped_ptr<DevToolsClient> client,
+                         DeviceMetrics* device_metrics)
     : id_(id),
       browser_info_(browser_info),
       dom_tracker_(new DomTracker(client.get())),
       frame_tracker_(new FrameTracker(client.get())),
       navigation_tracker_(new NavigationTracker(client.get(), browser_info)),
       dialog_manager_(new JavaScriptDialogManager(client.get())),
+      device_metrics_override_manager_(
+          new DeviceMetricsOverrideManager(client.get(), device_metrics)),
       geolocation_override_manager_(
           new GeolocationOverrideManager(client.get())),
       heap_snapshot_taker_(new HeapSnapshotTaker(client.get())),