GetCallbackForImplThread  286 cc/layers/texture_layer.cc       release_callback = holder->GetCallbackForImplThread();
GetCallbackForImplThread   43 cc/layers/texture_layer.h     scoped_ptr<SingleReleaseCallback> GetCallbackForImplThread();
GetCallbackForImplThread  597 cc/layers/texture_layer_unittest.cc     *impl_ref = main_ref_->holder()->GetCallbackForImplThread();