cc: Dedup IPCs to return resources to client

cc/trees/layer_tree_host_impl_unittest.cc

Index: cc/trees/layer_tree_host_impl_unittest.cc
diff --git a/cc/trees/layer_tree_host_impl_unittest.cc b/cc/trees/layer_tree_host_impl_unittest.cc
index b3807cf855a208316208b30489ff4317eaccab52..620151d9639fe2436387adcff996bae701e1ed79 100644
--- a/cc/trees/layer_tree_host_impl_unittest.cc
+++ b/cc/trees/layer_tree_host_impl_unittest.cc
@@ -35,7 +35,6 @@
 #include "cc/layers/video_layer_impl.h"
 #include "cc/layers/viewport.h"
 #include "cc/output/begin_frame_args.h"
-#include "cc/output/compositor_frame_ack.h"
 #include "cc/output/compositor_frame_metadata.h"
 #include "cc/output/copy_output_request.h"
 #include "cc/output/copy_output_result.h"
@@ -7782,8 +7781,7 @@ TEST_F(CompositorFrameMetadataTest, CompositorFrameAckCountsAsSwapComplete) {
     host_impl_->DrawLayers(&frame);
     host_impl_->DidDrawAllLayers(frame);
   }
-  CompositorFrameAck ack;
-  host_impl_->ReclaimResources(&ack);
+  host_impl_->ReclaimResources(ReturnedResourceArray());
   host_impl_->DidSwapBuffersComplete();
   EXPECT_EQ(swap_buffers_complete_, 1);
 }