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

chrome/renderer/chrome_content_renderer_client.h

 // 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.
 
 #ifndef CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 #define CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 173 matching lines @@
       int64_t service_worker_version_id,
       const GURL& url) override;
   void WillDestroyServiceWorkerContextOnWorkerThread(
       v8::Local<v8::Context> context,
       int64_t service_worker_version_id,
       const GURL& url) override;
   bool ShouldEnforceWebRTCRoutingPreferences() override;
   GURL OverrideFlashEmbedWithHTML(const GURL& url) override;
   std::unique_ptr<base::TaskScheduler::InitParams> GetTaskSchedulerInitParams()
       override;
+  bool CanBeBackgrounded() const override;
 
 #if BUILDFLAG(ENABLE_SPELLCHECK)
   // Sets a new |spellcheck|. Used for testing only.
   // Takes ownership of |spellcheck|.
   void SetSpellcheck(SpellCheck* spellcheck);
 #endif
 
 #if BUILDFLAG(ENABLE_PLUGINS)
   static blink::WebPlugin* CreatePlugin(
       content::RenderFrame* render_frame,
@@ skipping 64 matching lines @@
   // Observes module load and unload events and notifies the ModuleDatabase in
   // the browser process.
   std::unique_ptr<ModuleWatcher> module_watcher_;
   mojom::ModuleEventSinkPtr module_event_sink_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ChromeContentRendererClient);
 };
 
 #endif  // CHROME_RENDERER_CHROME_CONTENT_RENDERER_CLIENT_H_