Set device scale factor in CompositorFrame and scale frame size in WS.

services/ui/ws/platform_display_default.cc

 // Copyright 2016 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 "services/ui/ws/platform_display_default.h"
 
 #include "gpu/ipc/client/gpu_channel_host.h"
 #include "services/ui/display/screen_manager.h"
 #include "services/ui/ws/platform_display_init_params.h"
 #include "services/ui/ws/server_window.h"
@@ skipping 16 matching lines @@
 
 namespace ui {
 namespace ws {
 
 PlatformDisplayDefault::PlatformDisplayDefault(
     const PlatformDisplayInitParams& init_params)
     : display_id_(init_params.display_id),
 #if !defined(OS_ANDROID)
       cursor_loader_(ui::CursorLoader::Create()),
 #endif
-      frame_generator_(new FrameGenerator(this, init_params.root_window)),
+      frame_generator_(
+          new FrameGenerator(this,
+                             init_params.root_window,
+                             init_params.metrics.device_scale_factor)),
       metrics_(init_params.metrics) {
 }
 
 PlatformDisplayDefault::~PlatformDisplayDefault() {
   // Don't notify the delegate from the destructor.
   delegate_ = nullptr;
 
   frame_generator_.reset();
   // Destroy the PlatformWindow early on as it may call us back during
   // destruction and we want to be in a known state. But destroy the surface
@@ skipping 86 matching lines @@
   if (metrics_ == metrics)
     return false;
 
   gfx::Rect bounds = platform_window_->GetBounds();
   if (bounds.size() != metrics.pixel_size) {
     bounds.set_size(metrics.pixel_size);
     platform_window_->SetBounds(bounds);
   }
 
   metrics_ = metrics;
+  frame_generator_->UpdateDeviceScaleFactor(metrics_.device_scale_factor);
   return true;
 }
 
 const display::ViewportMetrics& PlatformDisplayDefault::GetViewportMetrics()
     const {
   return metrics_;
 }
 
 void PlatformDisplayDefault::UpdateEventRootLocation(ui::LocatedEvent* event) {
   gfx::Point location = event->location();
@@ skipping 85 matching lines @@
 }
 
 void PlatformDisplayDefault::OnActivationChanged(bool active) {}
 
 bool PlatformDisplayDefault::IsInHighContrastMode() {
   return delegate_ ? delegate_->IsInHighContrastMode() : false;
 }
 
 }  // namespace ws
 }  // namespace ui