Support computing percentiles on a rolling window of samples

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,
     'cc_source_files': [
       'animation/animation.cc',
       'animation/animation.h',
@@ skipping 288 matching lines @@
       'resources/transferable_resource.cc',
       'resources/transferable_resource.h',
       'resources/video_resource_updater.cc',
       'resources/video_resource_updater.h',
       'scheduler/delay_based_time_source.cc',
       'scheduler/delay_based_time_source.h',
       'scheduler/frame_rate_controller.cc',
       'scheduler/frame_rate_controller.h',
       'scheduler/rate_limiter.cc',
       'scheduler/rate_limiter.h',
+      'scheduler/rolling_sample_window.cc',
+      'scheduler/rolling_sample_window.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',
       'scheduler/texture_uploader.cc',
       'scheduler/texture_uploader.h',
       'scheduler/time_source.h',
       'scheduler/vsync_time_source.cc',
@@ skipping 46 matching lines @@
         'CC_IMPLEMENTATION=1',
       ],
       'sources': [
         '<@(cc_source_files)',
       ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
   ],
 }