Seems incorrect to se device_scale_factor in SetLocalSurfaceId.

cc/test/test_compositor_frame_sink.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 "cc/test/test_compositor_frame_sink.h"
 
 #include <stdint.h>
 #include <utility>
 
 #include "base/memory/ptr_util.h"
@@ skipping 112 matching lines @@
   test_client_ = nullptr;
   CompositorFrameSink::DetachFromClient();
 }
 
 void TestCompositorFrameSink::SubmitCompositorFrame(CompositorFrame frame) {
   test_client_->DisplayReceivedCompositorFrame(frame);
 
   if (!delegated_local_surface_id_.is_valid()) {
     delegated_local_surface_id_ = local_surface_id_allocator_->GenerateId();
   }
-  display_->SetLocalSurfaceId(delegated_local_surface_id_,
-                              frame.metadata.device_scale_factor);
+  display_->SetLocalSurfaceId(delegated_local_surface_id_);
+  display_->SetDeviceScaleFactor(frame.metadata.device_scale_factor);
 
   gfx::Size frame_size = frame.render_pass_list.back()->output_rect.size();
   display_->Resize(frame_size);
 
   bool synchronous = !display_->has_scheduler();
 
   SurfaceFactory::DrawCallback draw_callback;
   if (!synchronous) {
     // For async draws, we use a callback tell when it is done, but for sync
     // draws we don't need one. Unretained is safe here because the callback
@@ skipping 52 matching lines @@
     bool will_draw_and_swap,
     const RenderPassList& render_passes) {
   test_client_->DisplayWillDrawAndSwap(will_draw_and_swap, render_passes);
 }
 
 void TestCompositorFrameSink::DisplayDidDrawAndSwap() {
   test_client_->DisplayDidDrawAndSwap();
 }
 
 }  // namespace cc