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

third_party/WebKit/public/platform/scheduler/renderer/renderer_scheduler.h

 // Copyright 2014 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.
 
 #ifndef THIRD_PARTY_WEBKIT_PUBLIC_PLATFORM_SCHEDULER_RENDERER_RENDERER_SCHEDULER_H_
 #define THIRD_PARTY_WEBKIT_PUBLIC_PLATFORM_SCHEDULER_RENDERER_RENDERER_SCHEDULER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 29 matching lines @@
 
 class BLINK_PLATFORM_EXPORT RendererScheduler : public ChildScheduler {
  public:
   class BLINK_PLATFORM_EXPORT RAILModeObserver {
    public:
     virtual ~RAILModeObserver();
     virtual void OnRAILModeChanged(v8::RAILMode rail_mode) = 0;
   };
 
   ~RendererScheduler() override;
-  static std::unique_ptr<RendererScheduler> Create();
+
+  enum class RendererType {
+    kForegroundOnly,
+    kForegroundAndBackground,
+  };
+  static std::unique_ptr<RendererScheduler> Create(RendererType type);
 
   // Returns the compositor task runner.
   virtual scoped_refptr<base::SingleThreadTaskRunner>
   CompositorTaskRunner() = 0;
 
   // Creates a WebThread implementation for the renderer main thread.
   virtual std::unique_ptr<WebThread> CreateMainThread() = 0;
 
   // Returns the loading task runner.  This queue is intended for tasks related
   // to resource dispatch, foreground HTML parsing, etc...
@@ skipping 130 matching lines @@
 
  protected:
   RendererScheduler();
   DISALLOW_COPY_AND_ASSIGN(RendererScheduler);
 };
 
 }  // namespace scheduler
 }  // namespace blink
 
 #endif  // THIRD_PARTY_WEBKIT_PUBLIC_PLATFORM_SCHEDULER_RENDERER_RENDERER_SCHEDULER_H_