Implement aura::Window::CreateCompositorFrameSink()

cc/surfaces/direct_compositor_frame_sink.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 "cc/surfaces/direct_compositor_frame_sink.h"
 
 #include "base/bind.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_sink_client.h"
 #include "cc/surfaces/display.h"
@@ skipping 92 matching lines @@
     delegated_local_surface_id_ = local_surface_id_allocator_.GenerateId();
     last_swap_frame_size_ = frame_size;
   }
   display_->SetLocalSurfaceId(delegated_local_surface_id_,
                               frame.metadata.device_scale_factor);
 
   support_->SubmitCompositorFrame(delegated_local_surface_id_,
                                   std::move(frame));
 }
 
+void DirectCompositorFrameSink::EvictFrame() {
+  support_->EvictFrame();
+}
+
 void DirectCompositorFrameSink::DisplayOutputSurfaceLost() {
   is_lost_ = true;
   client_->DidLoseCompositorFrameSink();
 }
 
 void DirectCompositorFrameSink::DisplayWillDrawAndSwap(
     bool will_draw_and_swap,
     const RenderPassList& render_passes) {
   // This notification is not relevant to our client outside of tests.
 }
@@ skipping 29 matching lines @@
   support_->SetNeedsBeginFrame(needs_begin_frame);
 }
 
 void DirectCompositorFrameSink::OnDidFinishFrame(const BeginFrameAck& ack) {
   // If there was damage, SubmitCompositorFrame includes the ack.
   if (!ack.has_damage)
     support_->BeginFrameDidNotSwap(ack);
 }
 
 }  // namespace cc