cc: Dedup IPCs to return resources to client

cc/BUILD.gn

 # 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.
 
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 
 component("cc") {
   sources = [
     "animation/animation.cc",
@@ skipping 185 matching lines @@
     "output/begin_frame_args.cc",
     "output/begin_frame_args.h",
     "output/bsp_tree.cc",
     "output/bsp_tree.h",
     "output/bsp_walk_action.cc",
     "output/bsp_walk_action.h",
     "output/ca_layer_overlay.cc",
     "output/ca_layer_overlay.h",
     "output/compositor_frame.cc",
     "output/compositor_frame.h",
-    "output/compositor_frame_ack.cc",
-    "output/compositor_frame_ack.h",
     "output/compositor_frame_metadata.cc",
     "output/compositor_frame_metadata.h",
     "output/context_provider.h",
     "output/copy_output_request.cc",
     "output/copy_output_request.h",
     "output/copy_output_result.cc",
     "output/copy_output_result.h",
     "output/delegated_frame_data.cc",
     "output/delegated_frame_data.h",
     "output/delegating_renderer.cc",
@@ skipping 825 matching lines @@
     "//ui/gfx/geometry",
     "//ui/gl",
     "//ui/gl:test_support",
   ]
 
   # This target should not require the Chrome executable to run.
   assert_no_deps = [ "//chrome" ]
 }
 # When adding support for isolates, please have a look at run-time dependencies
 # in the cc_unittests_run target in cc_tests.gyp.