Implement DisplayList GatherPixelRefs

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("//testing/test.gni")
 
 component("cc") {
   sources = [
     "animation/animation.cc",
     "animation/animation.h",
@@ skipping 763 matching lines @@
     "output/output_surface_unittest.cc",
     "output/overlay_unittest.cc",
     "output/renderer_pixeltest.cc",
     "output/renderer_unittest.cc",
     "output/shader_unittest.cc",
     "output/software_renderer_unittest.cc",
     "quads/draw_quad_unittest.cc",
     "quads/list_container_unittest.cc",
     "quads/render_pass_unittest.cc",
     "resources/display_item_list_unittest.cc",
+    "resources/display_list_recording_source_unittest.cc",
     "resources/layer_quad_unittest.cc",
     "resources/picture_layer_tiling_set_unittest.cc",
     "resources/picture_layer_tiling_unittest.cc",
     "resources/picture_pile_impl_unittest.cc",
     "resources/picture_pile_unittest.cc",
     "resources/picture_unittest.cc",
     "resources/pixel_ref_map_unittest.cc",
     "resources/platform_color_unittest.cc",
     "resources/prioritized_resource_unittest.cc",
     "resources/resource_provider_unittest.cc",
@@ skipping 106 matching lines @@
     "//testing/gmock",
     "//testing/gtest",
     "//testing/perf",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/gl",
   ]
 }
 # When adding support for isolates, please have a look at run-time dependencies
 # in the cc_unittests_run target in cc_tests.gyp.