[scheduler] Monitor renderer load level.

third_party/WebKit/Source/platform/blink_platform.gypi

Index: third_party/WebKit/Source/platform/blink_platform.gypi
diff --git a/third_party/WebKit/Source/platform/blink_platform.gypi b/third_party/WebKit/Source/platform/blink_platform.gypi
index 01c3558123f3dc44a1ce8d9fa18c2251b8e9500d..9c030ee859875a7e990b48149fc5da894abd1817 100644
--- a/third_party/WebKit/Source/platform/blink_platform.gypi
+++ b/third_party/WebKit/Source/platform/blink_platform.gypi
@@ -986,14 +986,16 @@
       'scheduler/renderer/deadline_task_runner.h',
       'scheduler/renderer/idle_time_estimator.cc',
       'scheduler/renderer/idle_time_estimator.h',
+      'scheduler/renderer/render_widget_scheduling_state.cc',
+      'scheduler/renderer/render_widget_signals.cc',
+      'scheduler/renderer/render_widget_signals.h',
+      'scheduler/renderer/renderer_load_tracker.cc',
+      'scheduler/renderer/renderer_load_tracker.h',
       'scheduler/renderer/renderer_scheduler.cc',
       'scheduler/renderer/renderer_scheduler_impl.cc',
       'scheduler/renderer/renderer_scheduler_impl.h',
       'scheduler/renderer/renderer_web_scheduler_impl.cc',
       'scheduler/renderer/renderer_web_scheduler_impl.h',
-      'scheduler/renderer/render_widget_scheduling_state.cc',
-      'scheduler/renderer/render_widget_signals.cc',
-      'scheduler/renderer/render_widget_signals.h',
       'scheduler/renderer/task_cost_estimator.cc',
       'scheduler/renderer/task_cost_estimator.h',
       'scheduler/renderer/throttled_time_domain.cc',
@@ -1004,10 +1006,10 @@
       'scheduler/renderer/user_model.h',
       'scheduler/renderer/web_frame_scheduler_impl.cc',
       'scheduler/renderer/web_frame_scheduler_impl.h',
-      'scheduler/renderer/webthread_impl_for_renderer_scheduler.cc',
-      'scheduler/renderer/webthread_impl_for_renderer_scheduler.h',
       'scheduler/renderer/web_view_scheduler_impl.cc',
       'scheduler/renderer/web_view_scheduler_impl.h',
+      'scheduler/renderer/webthread_impl_for_renderer_scheduler.cc',
+      'scheduler/renderer/webthread_impl_for_renderer_scheduler.h',
       'scheduler/utility/webthread_impl_for_utility_thread.cc',
       'scroll/MainThreadScrollingReason.h',
       'scroll/ProgrammaticScrollAnimator.cpp',
@@ -1331,12 +1333,13 @@
       'scheduler/renderer/auto_advancing_virtual_time_domain_unittest.cc',
       'scheduler/renderer/deadline_task_runner_unittest.cc',
       'scheduler/renderer/idle_time_estimator_unittest.cc',
+      'scheduler/renderer/renderer_load_tracker_unittest.cc',
       'scheduler/renderer/renderer_scheduler_impl_unittest.cc',
       'scheduler/renderer/task_cost_estimator_unittest.cc',
       'scheduler/renderer/throttling_helper_unittest.cc',
       'scheduler/renderer/user_model_unittest.cc',
-      'scheduler/renderer/webthread_impl_for_renderer_scheduler_unittest.cc',
       'scheduler/renderer/web_view_scheduler_impl_unittest.cc',
+      'scheduler/renderer/webthread_impl_for_renderer_scheduler_unittest.cc',
       'scroll/ScrollableAreaTest.cpp',
       'testing/ArenaTestHelpers.h',
       'testing/TreeTestHelpers.cpp',