[Blink-Scheduler] Distinguish between normal and foreground-only renderers for monitoring load.

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 1f51af05768cec3ce702e55f26f648b462ed9ede..2b5e09caff08888f8c0456967d13bc2182938048 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -538,8 +538,14 @@ bool RenderThreadImpl::HistogramCustomizer::IsAlexaTop10NonGoogleSite(
 // static
 RenderThreadImpl* RenderThreadImpl::Create(
     const InProcessChildThreadParams& params) {
-  std::unique_ptr<blink::scheduler::RendererScheduler> renderer_scheduler =
-      blink::scheduler::RendererScheduler::Create();
+  using blink::scheduler::RendererScheduler;
+  const bool can_be_backgrounded =
+      GetContentClient()->renderer()->CanBeBackgrounded();
+  std::unique_ptr<RendererScheduler> renderer_scheduler =
+      RendererScheduler::Create(
+          can_be_backgrounded
+              ? RendererScheduler::RendererType::kForegroundAndBackground
+              : RendererScheduler::RendererType::kForegroundOnly);
   scoped_refptr<base::SingleThreadTaskRunner> test_task_counter;
   return new RenderThreadImpl(
       params, std::move(renderer_scheduler), test_task_counter);