[ChromeDriver] Support mobile emulation on desktop Chrome.

chrome/test/chromedriver/chrome/device_metrics.cc

Index: chrome/test/chromedriver/chrome/device_metrics.cc
diff --git a/chrome/test/chromedriver/chrome/device_metrics.cc b/chrome/test/chromedriver/chrome/device_metrics.cc
new file mode 100644
index 0000000000000000000000000000000000000000..155c0fbb95f2a48fa25516e070c639395b29a449
--- /dev/null
+++ b/chrome/test/chromedriver/chrome/device_metrics.cc
@@ -0,0 +1,22 @@
+// Copyright (c) 2014 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/device_metrics.h"
+
+DeviceMetrics::DeviceMetrics() : width(-1) {}
+
+DeviceMetrics::DeviceMetrics(int width, int height, double device_scale_factor)
+  : width(width),
+  height(height),

[stgao, 2014/05/14 05:10:14]

indent

[sam.rawlins, 2014/05/16 21:09:38]

Done.

+  device_scale_factor(device_scale_factor),
+  emulate_viewport(false),
+  fit_window(true),
+  text_autosizing(true),
+  font_scale_factor(1) {}
+
+DeviceMetrics::~DeviceMetrics() {}
+
+bool DeviceMetrics::IsValid() const {
+  return width > 0;
+}