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

content/renderer/render_thread_impl.cc

 // 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.
 
 #include "content/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <utility>
@@ skipping 520 matching lines @@
         return true;
       }
     }
   }
   return false;
 }
 
 // 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);
 }
 
 // static
 RenderThreadImpl* RenderThreadImpl::Create(
     std::unique_ptr<base::MessageLoop> main_message_loop,
     std::unique_ptr<blink::scheduler::RendererScheduler> renderer_scheduler) {
   return new RenderThreadImpl(std::move(main_message_loop),
@@ skipping 1905 matching lines @@
   }
 }
 
 void RenderThreadImpl::OnRendererInterfaceRequest(
     mojom::RendererAssociatedRequest request) {
   DCHECK(!renderer_binding_.is_bound());
   renderer_binding_.Bind(std::move(request));
 }
 
 }  // namespace content