CC Animation: Use ElementId to attach CC animation players.

cc/cc_tests.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'chromium_code': 1,
     'cc_unit_tests_source_files': [
       'animation/animation_host_unittest.cc',
       'animation/animation_player_unittest.cc',
@@ skipping 275 matching lines @@
       'test/surface_aggregator_test_helpers.cc',
       'test/surface_aggregator_test_helpers.h',
       'test/surface_hittest_test_helpers.cc',
       'test/surface_hittest_test_helpers.h',
       'test/task_graph_runner_test_template.cc',
       'test/task_graph_runner_test_template.h',
       'test/test_context_provider.cc',
       'test/test_context_provider.h',
       'test/test_context_support.cc',
       'test/test_context_support.h',
+      'test/test_element_id.cc',
+      'test/test_element_id.h',
       'test/test_gles2_interface.cc',
       'test/test_gles2_interface.h',
       'test/test_gpu_memory_buffer_manager.cc',
       'test/test_gpu_memory_buffer_manager.h',
       'test/test_hooks.cc',
       'test/test_hooks.h',
       'test/test_image_factory.cc',
       'test/test_image_factory.h',
       'test/test_in_process_context_provider.cc',
       'test/test_in_process_context_provider.h',
@@ skipping 199 matching lines @@
                   '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
                 ],
               }
             ],
           ],
         },
       ],
     }],
   ],
 }