Refactoring the way begin frame sources inside scheduler work.

cc/cc.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,
   },
   'targets': [
     {
@@ skipping 289 matching lines @@
         'output/shader.cc',
         'output/shader.h',
         'output/software_frame_data.cc',
         'output/software_frame_data.h',
         'output/software_output_device.cc',
         'output/software_output_device.h',
         'output/software_renderer.cc',
         'output/software_renderer.h',
         'output/viewport_selection_bound.cc',
         'output/viewport_selection_bound.h',
+        'output/vsync_parameter_observer.h',
         'quads/checkerboard_draw_quad.cc',
         'quads/checkerboard_draw_quad.h',
         'quads/content_draw_quad_base.cc',
         'quads/content_draw_quad_base.h',
         'quads/debug_border_draw_quad.cc',
         'quads/debug_border_draw_quad.h',
         'quads/draw_polygon.cc',
         'quads/draw_polygon.h',
         'quads/draw_quad.cc',
         'quads/draw_quad.h',
@@ skipping 131 matching lines @@
         'resources/transferable_resource.h',
         'resources/ui_resource_bitmap.cc',
         'resources/ui_resource_bitmap.h',
         'resources/ui_resource_client.h',
         'resources/ui_resource_request.cc',
         'resources/ui_resource_request.h',
         'resources/video_resource_updater.cc',
         'resources/video_resource_updater.h',
         'resources/zero_copy_raster_worker_pool.cc',
         'resources/zero_copy_raster_worker_pool.h',
+        'scheduler/begin_frame_source.cc',
+        'scheduler/begin_frame_source.h',
         'scheduler/delay_based_time_source.cc',
         'scheduler/delay_based_time_source.h',
         'scheduler/draw_result.h',
         'scheduler/scheduler.cc',
         'scheduler/scheduler.h',
         'scheduler/scheduler_settings.cc',
         'scheduler/scheduler_settings.h',
         'scheduler/scheduler_state_machine.cc',
         'scheduler/scheduler_state_machine.h',
         'trees/blocking_task_runner.cc',
@@ skipping 71 matching lines @@
         'surfaces/surface_resource_holder.cc',
         'surfaces/surface_resource_holder.h',
         'surfaces/surfaces_export.h',
       ],
       'includes': [
         '../build/android/increase_size_for_speed.gypi',
       ],
     },
   ],
 }