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

cc/surfaces/surface_display_output_surface.cc

Index: cc/surfaces/surface_display_output_surface.cc
diff --git a/cc/surfaces/surface_display_output_surface.cc b/cc/surfaces/surface_display_output_surface.cc
index 397cf2fddd2c9a6e5f8af0029f05e573dab8ce33..dd89c521d1dfc07adcec726c67d8f0a4d7036e94 100644
--- a/cc/surfaces/surface_display_output_surface.cc
+++ b/cc/surfaces/surface_display_output_surface.cc
@@ -60,7 +60,8 @@ SurfaceDisplayOutputSurface::~SurfaceDisplayOutputSurface() {
     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_) {
@@ -76,10 +77,8 @@ void SurfaceDisplayOutputSurface::SwapBuffers(CompositorFrame* frame) {
 
   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)));
 }