[DevTools] Handle emulation in embedder, call into web API.

content/renderer/render_view_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 "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 3615 matching lines @@
     return focused_pepper_plugin_->IsPluginAcceptingCompositionEvents();
 #endif
   return true;
 }
 
 void RenderViewImpl::DidCompletePageScaleAnimation() {
   FocusChangeComplete();
 }
 
 void RenderViewImpl::SetScreenMetricsEmulationParameters(
-    float device_scale_factor,
-    const gfx::Point& root_layer_offset,
-    float root_layer_scale) {
+    bool enabled,
+    const blink::WebDeviceEmulationParams& params) {
   if (webview() && compositor()) {
-    webview()->setCompositorDeviceScaleFactorOverride(device_scale_factor);
-    webview()->setRootLayerTransform(
-        blink::WebSize(root_layer_offset.x(), root_layer_offset.y()),
-        root_layer_scale);
+    if (enabled)
+      webview()->enableDeviceEmulation(params);
+    else
+      webview()->disableDeviceEmulation();
   }
 }
 
 bool RenderViewImpl::ScheduleFileChooser(
     const FileChooserParams& params,
     WebFileChooserCompletion* completion) {
   static const size_t kMaximumPendingFileChooseRequests = 4;
   if (file_chooser_completions_.size() > kMaximumPendingFileChooseRequests) {
     // This sanity check prevents too many file choose requests from getting
     // queued which could DoS the user. Getting these is most likely a
@@ skipping 374 matching lines @@
     std::vector<gfx::Size> sizes;
     ConvertToFaviconSizes(icon_urls[i].sizes(), &sizes);
     if (!url.isEmpty())
       urls.push_back(
           FaviconURL(url, ToFaviconType(icon_urls[i].iconType()), sizes));
   }
   SendUpdateFaviconURL(urls);
 }
 
 }  // namespace content