cc: Dedup IPCs to return resources to client

cc/layers/texture_layer_unittest.cc

Index: cc/layers/texture_layer_unittest.cc
diff --git a/cc/layers/texture_layer_unittest.cc b/cc/layers/texture_layer_unittest.cc
index 3a13f3d899c356dd4160e4882860afd6b447ba1e..bcb5079ec50a1386502b8ca9d0832b4101474e1a 100644
--- a/cc/layers/texture_layer_unittest.cc
+++ b/cc/layers/texture_layer_unittest.cc
@@ -25,7 +25,6 @@
 #include "cc/layers/solid_color_layer.h"
 #include "cc/layers/texture_layer_client.h"
 #include "cc/layers/texture_layer_impl.h"
-#include "cc/output/compositor_frame_ack.h"
 #include "cc/output/context_provider.h"
 #include "cc/resources/returned_resource.h"
 #include "cc/test/fake_impl_task_runner_provider.h"
@@ -1116,10 +1115,10 @@ class TextureLayerNoExtraCommitForMailboxTest
     TransferableResourceArray resources_to_return =
         output_surface()->resources_held_by_parent();
 
-    CompositorFrameAck ack;
+    ReturnedResourceArray resources;
     for (size_t i = 0; i < resources_to_return.size(); ++i)
-      output_surface()->ReturnResource(resources_to_return[i].id, &ack);
-    host_impl->ReclaimResources(&ack);
+      output_surface()->ReturnResource(resources_to_return[i].id, &resources);
+    host_impl->ReclaimResources(resources);
   }
 
   void AfterTest() override {}
@@ -1253,10 +1252,10 @@ class TextureLayerChangeInvisibleMailboxTest
     TransferableResourceArray resources_to_return =
         output_surface()->resources_held_by_parent();
 
-    CompositorFrameAck ack;
+    ReturnedResourceArray resources;
     for (size_t i = 0; i < resources_to_return.size(); ++i)
-      output_surface()->ReturnResource(resources_to_return[i].id, &ack);
-    host_impl->ReclaimResources(&ack);
+      output_surface()->ReturnResource(resources_to_return[i].id, &resources);
+    host_impl->ReclaimResources(resources);
   }
 
   void AfterTest() override {}