[scheduler] Monitor renderer load level.

third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.h

Index: third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.h
diff --git a/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.h b/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.h
index 77705b4627e7dc60e28fb7bebe752781e99bd79e..aab4e426509fb8e8a82130d45a9eb3a74c78c575 100644
--- a/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.h
+++ b/third_party/WebKit/Source/platform/scheduler/renderer/renderer_scheduler_impl.h
@@ -17,11 +17,12 @@
 #include "platform/scheduler/renderer/deadline_task_runner.h"
 #include "platform/scheduler/renderer/idle_time_estimator.h"
 #include "platform/scheduler/renderer/render_widget_signals.h"
-#include "public/platform/scheduler/renderer/renderer_scheduler.h"
+#include "platform/scheduler/renderer/renderer_load_tracker.h"
 #include "platform/scheduler/renderer/task_cost_estimator.h"
 #include "platform/scheduler/renderer/throttling_helper.h"
 #include "platform/scheduler/renderer/user_model.h"
 #include "platform/scheduler/renderer/web_view_scheduler_impl.h"
+#include "public/platform/scheduler/renderer/renderer_scheduler.h"
 
 namespace base {
 namespace trace_event {
@@ -382,6 +383,8 @@ class BLINK_PLATFORM_EXPORT RendererSchedulerImpl
     QueueingTimeEstimator queueing_time_estimator;
     LongTaskTracker long_task_tracker;
     IdleTimeEstimator idle_time_estimator;
+    RendererLoadTracker background_renderer_load_tracker;
+    RendererLoadTracker foreground_renderer_load_tracker;
     UseCase current_use_case;
     Policy current_policy;
     base::TimeTicks current_policy_expiration_time;