Plumbs through screen size and scale factor to html_viewer

components/native_viewport/native_viewport_impl.cc

 // Copyright 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 "components/native_viewport/native_viewport_impl.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 81 matching lines @@
   sent_metrics_ = false;
 
   if (!metrics_callback_.is_null()) {
     metrics_callback_.Run(metrics_.Clone());
     metrics_callback_.reset();
     sent_metrics_ = true;
   }
 }
 
 void NativeViewportImpl::OnAcceleratedWidgetAvailable(
-    gfx::AcceleratedWidget widget) {
+    gfx::AcceleratedWidget widget,
+    float device_pixel_ratio) {
+  metrics_->device_pixel_ratio = device_pixel_ratio;
   context_provider_.SetAcceleratedWidget(widget);
   // TODO: The metrics here might not match the actual window size on android
   // where we don't know the actual size until the first OnMetricsChanged call.
   create_callback_.Run(metrics_.Clone());
   sent_metrics_ = true;
   create_callback_.reset();
 }
 
 void NativeViewportImpl::OnAcceleratedWidgetDestroyed() {
   context_provider_.SetAcceleratedWidget(gfx::kNullAcceleratedWidget);
@@ skipping 42 matching lines @@
 void NativeViewportImpl::OnConnectionError() {
   binding_.set_error_handler(nullptr);
   delete this;
 }
 
 void NativeViewportImpl::AckEvent(int32 pointer_id) {
   pointers_waiting_on_ack_.erase(pointer_id);
 }
 
 }  // namespace native_viewport