cc: return resources via a ReturnedResource struct rather than TransferableResource

cc/test/fake_output_surface.cc

Index: cc/test/fake_output_surface.cc
diff --git a/cc/test/fake_output_surface.cc b/cc/test/fake_output_surface.cc
index 32367fd05a292cb7d1055c13b4fbb141c9a852d2..bc94f1942a11f5eb946dcdd35eb0a9c49cb53888 100644
--- a/cc/test/fake_output_surface.cc
+++ b/cc/test/fake_output_surface.cc
@@ -8,6 +8,7 @@
 #include "base/message_loop/message_loop.h"
 #include "cc/output/compositor_frame_ack.h"
 #include "cc/output/output_surface_client.h"
+#include "cc/resources/returned_resource.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
@@ -126,7 +127,7 @@ void FakeOutputSurface::ReturnResource(unsigned id, CompositorFrameAck* ack) {
       break;
   }
   DCHECK(it != resources_held_by_parent_.end());
-  ack->resources.push_back(*it);
+  ack->resources.push_back(it->ToReturnedResource());
   resources_held_by_parent_.erase(it);
 }