Make cc::CompositorFrames movable [Part 1 of 2]

cc/surfaces/surface_display_output_surface.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/surface_display_output_surface.h"
 
 #include "base/bind.h"
 #include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/surfaces/display.h"
@@ skipping 42 matching lines @@
   capabilities_.adjust_deadline_for_parent = true;
   capabilities_.can_force_reclaim_resources = true;
 }
 
 SurfaceDisplayOutputSurface::~SurfaceDisplayOutputSurface() {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (HasClient())
     DetachFromClient();
 }
 
-void SurfaceDisplayOutputSurface::SwapBuffers(CompositorFrame* frame) {
+void SurfaceDisplayOutputSurface::SwapBuffers(
+    std::unique_ptr<CompositorFrame> frame) {
   gfx::Size frame_size =
       frame->delegated_frame_data->render_pass_list.back()->output_rect.size();
   if (frame_size.IsEmpty() || frame_size != last_swap_frame_size_) {
     if (!delegated_surface_id_.is_null()) {
       factory_.Destroy(delegated_surface_id_);
     }
     delegated_surface_id_ = surface_id_allocator_->GenerateId();
     factory_.Create(delegated_surface_id_);
     last_swap_frame_size_ = frame_size;
   }
   display_->SetSurfaceId(delegated_surface_id_,
                          frame->metadata.device_scale_factor);
 
   client_->DidSwapBuffers();
 
-  std::unique_ptr<CompositorFrame> frame_copy(new CompositorFrame());
-  frame->AssignTo(frame_copy.get());
   factory_.SubmitCompositorFrame(
-      delegated_surface_id_, std::move(frame_copy),
+      delegated_surface_id_, std::move(frame),
       base::Bind(&SurfaceDisplayOutputSurface::SwapBuffersComplete,
                  base::Unretained(this)));
 }
 
 bool SurfaceDisplayOutputSurface::BindToClient(OutputSurfaceClient* client) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   surface_manager_->RegisterSurfaceFactoryClient(
       surface_id_allocator_->id_namespace(), this);
 
@@ skipping 66 matching lines @@
   SetMemoryPolicy(policy);
 }
 
 void SurfaceDisplayOutputSurface::SwapBuffersComplete(SurfaceDrawStatus drawn) {
   // TODO(danakj): Why the lost check?
   if (!output_surface_lost_)
     client_->DidSwapBuffersComplete();
 }
 
 }  // namespace cc