Allow requesting a copy of a surface.

cc/surfaces/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.h"
 
 #include "cc/output/compositor_frame.h"
+#include "cc/output/copy_output_request.h"
 #include "cc/surfaces/surface_factory.h"
 
 namespace cc {
 
 // The frame index starts at 2 so that empty frames will be treated as
 // completely damaged the first time they're drawn from.
 static const int kFrameIndexStart = 2;
 
 Surface::Surface(SurfaceId id, const gfx::Size& size, SurfaceFactory* factory)
     : surface_id_(id),
@@ skipping 25 matching lines @@
     TransferableResource::ReturnResources(
         previous_frame->delegated_frame_data->resource_list,
         &previous_resources);
     factory_->UnrefResources(previous_resources);
   }
   if (!draw_callback_.is_null())
     draw_callback_.Run();
   draw_callback_ = callback;
 }
 
+void Surface::RequestCopyOfOutput(scoped_ptr<CopyOutputRequest> copy_request) {
+  // TODO(jbauman): Make this work.
+  copy_request->SendEmptyResult();
+}
+
 const CompositorFrame* Surface::GetEligibleFrame() {
   return current_frame_.get();
 }
 
 void Surface::RunDrawCallbacks() {
   if (!draw_callback_.is_null()) {
     base::Closure callback = draw_callback_;
     draw_callback_ = base::Closure();
     callback.Run();
   }
 }
 
 }  // namespace cc