cc: Adding BeginFrameObserverMap.

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 708 matching lines @@
     "animation/layer_animation_controller_unittest.cc",
     "animation/scroll_offset_animation_curve_unittest.cc",
     "animation/scrollbar_animation_controller_linear_fade_unittest.cc",
     "animation/scrollbar_animation_controller_thinning_unittest.cc",
     "animation/transform_operations_unittest.cc",
     "base/delayed_unique_notifier_unittest.cc",
     "base/float_quad_unittest.cc",
     "base/histograms_unittest.cc",
     "base/list_container_unittest.cc",
     "base/math_util_unittest.cc",
+    "base/observer_map_unittest.cc",
     "base/region_unittest.cc",
     "base/rolling_time_delta_history_unittest.cc",
     "base/scoped_ptr_vector_unittest.cc",
     "base/sidecar_list_container_unittest.cc",
     "base/simple_enclosed_region_unittest.cc",
     "base/tiling_data_unittest.cc",
     "base/unique_notifier_unittest.cc",
     "debug/frame_timing_tracker_unittest.cc",
     "debug/micro_benchmark_controller_unittest.cc",
     "debug/rendering_stats_unittest.cc",
@@ skipping 190 matching lines @@
     "//ui/gl",
     "//ui/gl:test_support",
   ]
 
   if (is_android) {
     isolate_file = "cc_perftests.isolate"
   }
 }
 # When adding support for isolates, please have a look at run-time dependencies
 # in the cc_unittests_run target in cc_tests.gyp.