Enforce constant size and device scale factor for surfaces

components/viz/frame_sinks/gpu_root_compositor_frame_sink.h

 // Copyright 2017 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.
 
 #ifndef COMPONENTS_VIZ_FRAME_SINKS_GPU_ROOT_COMPOSITOR_FRAME_SINK_H_
 #define COMPONENTS_VIZ_FRAME_SINKS_GPU_ROOT_COMPOSITOR_FRAME_SINK_H_
 
 #include "cc/ipc/frame_sink_manager.mojom.h"
 #include "cc/ipc/mojo_compositor_frame_sink.mojom.h"
 #include "cc/surfaces/compositor_frame_sink_support_client.h"
@@ skipping 62 matching lines @@
                               const cc::RenderPassList& render_passes) override;
   void DisplayDidDrawAndSwap() override;
 
   // cc::CompositorFrameSinkSupportClient:
   void DidReceiveCompositorFrameAck(
       const cc::ReturnedResourceArray& resources) override;
   void OnBeginFrame(const cc::BeginFrameArgs& args) override;
   void ReclaimResources(const cc::ReturnedResourceArray& resources) override;
   void WillDrawSurface(const cc::LocalSurfaceId& local_surface_id,
                        const gfx::Rect& damage_rect) override;
+  void DidRejectCompositorFrame() override;
 
   void OnClientConnectionLost();
   void OnPrivateConnectionLost();
 
   GpuCompositorFrameSinkDelegate* const delegate_;
   std::unique_ptr<cc::CompositorFrameSinkSupport> support_;
 
   // GpuRootCompositorFrameSink holds a Display and its BeginFrameSource if
   // it was created with a non-null gpu::SurfaceHandle.
   std::unique_ptr<cc::BeginFrameSource> display_begin_frame_source_;
   std::unique_ptr<cc::Display> display_;
 
   bool client_connection_lost_ = false;
   bool private_connection_lost_ = false;
 
   cc::mojom::MojoCompositorFrameSinkClientPtr client_;
   mojo::AssociatedBinding<cc::mojom::MojoCompositorFrameSink>
       compositor_frame_sink_binding_;
   mojo::Binding<cc::mojom::MojoCompositorFrameSinkPrivate>
       compositor_frame_sink_private_binding_;
   mojo::AssociatedBinding<cc::mojom::DisplayPrivate> display_private_binding_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuRootCompositorFrameSink);
 };
 
 }  // namespace viz
 
 #endif  // COMPONENTS_VIZ_FRAME_SINKS_GPU_ROOT_COMPOSITOR_FRAME_SINK_H_