Implement aura::Window::CreateCompositorFrameSink()

services/ui/ws/display_client_compositor_frame_sink.cc

 // 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.
 
 #include "services/ui/ws/display_client_compositor_frame_sink.h"
 
 #include "base/threading/thread_checker.h"
 #include "cc/output/compositor_frame_sink_client.h"
 
 namespace ui {
@@ skipping 47 matching lines @@
     local_surface_id_ = id_allocator_.GenerateId();
     display_private_->ResizeDisplay(frame_size);
   }
   display_private_->SetLocalSurfaceId(local_surface_id_,
                                       frame.metadata.device_scale_factor);
   compositor_frame_sink_->SubmitCompositorFrame(local_surface_id_,
                                                 std::move(frame));
   last_submitted_frame_size_ = frame_size;
 }
 
+void DisplayClientCompositorFrameSink::EvictFrame() {
+  DCHECK(thread_checker_->CalledOnValidThread());
+  if (!compositor_frame_sink_)
+    return;
+  compositor_frame_sink_->EvictFrame();
+}
+
 void DisplayClientCompositorFrameSink::DidReceiveCompositorFrameAck(
     const cc::ReturnedResourceArray& resources) {
   DCHECK(thread_checker_->CalledOnValidThread());
   if (!client_)
     return;
   client_->ReclaimResources(resources);
   client_->DidReceiveCompositorFrameAck();
 }
 
 void DisplayClientCompositorFrameSink::OnBeginFrame(
@@ skipping 18 matching lines @@
 
 void DisplayClientCompositorFrameSink::OnDidFinishFrame(
     const cc::BeginFrameAck& ack) {
   // If there was damage, the submitted CompositorFrame includes the ack.
   if (!ack.has_damage)
     compositor_frame_sink_->BeginFrameDidNotSwap(ack);
 }
 
 }  // namespace ws
 }  // namespace ui