Allow requesting a copy of a surface.

cc/surfaces/surface_factory.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_factory.h"
 
 #include "cc/output/compositor_frame.h"
+#include "cc/output/copy_output_request.h"
 #include "cc/surfaces/surface.h"
 #include "cc/surfaces/surface_manager.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace cc {
 SurfaceFactory::SurfaceFactory(SurfaceManager* manager,
                                SurfaceFactoryClient* client)
     : manager_(manager), client_(client), holder_(client) {
 }
 
@@ skipping 19 matching lines @@
 void SurfaceFactory::SubmitFrame(SurfaceId surface_id,
                                  scoped_ptr<CompositorFrame> frame,
                                  const base::Closure& callback) {
   OwningSurfaceMap::iterator it = surface_map_.find(surface_id);
   DCHECK(it != surface_map_.end());
   DCHECK(it->second->factory() == this);
   it->second->QueueFrame(frame.Pass(), callback);
   manager_->SurfaceModified(surface_id);
 }
 
+void SurfaceFactory::RequestCopyOfSurface(
+    SurfaceId surface_id,
+    scoped_ptr<CopyOutputRequest> copy_request) {
+  OwningSurfaceMap::iterator it = surface_map_.find(surface_id);
+  if (it == surface_map_.end()) {
+    copy_request->SendEmptyResult();
+    return;
+  }
+  DCHECK(it->second->factory() == this);
+  it->second->RequestCopyOfOutput(copy_request.Pass());
+}
+
 void SurfaceFactory::ReceiveFromChild(
     const TransferableResourceArray& resources) {
   holder_.ReceiveFromChild(resources);
 }
 
 void SurfaceFactory::RefResources(const TransferableResourceArray& resources) {
   holder_.RefResources(resources);
 }
 
 void SurfaceFactory::UnrefResources(const ReturnedResourceArray& resources) {
   holder_.UnrefResources(resources);
 }
 
 }  // namespace cc