Replaced TestNowSource with SimpleTestTickClock.

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_unittest.cc',
       'animation/keyframed_animation_curve_unittest.cc',
@@ skipping 245 matching lines @@
       'test/test_context_support.cc',
       'test/test_context_support.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_image_factory.cc',
       'test/test_image_factory.h',
       'test/test_in_process_context_provider.cc',
       'test/test_in_process_context_provider.h',
-      'test/test_now_source.cc',
-      'test/test_now_source.h',
       'test/test_occlusion_tracker.h',
       'test/test_shared_bitmap_manager.cc',
       'test/test_shared_bitmap_manager.h',
       'test/test_task_graph_runner.cc',
       'test/test_task_graph_runner.h',
       'test/test_texture.cc',
       'test/test_texture.h',
       'test/test_tile_priorities.cc',
       'test/test_tile_priorities.h',
       'test/test_web_graphics_context_3d.cc',
@@ skipping 204 matching lines @@
                   '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
                 ],
               }
             ],
           ],
         },
       ],
     }],
   ],
 }