[Android] Suspend shared timers for hidden renderers

content/public/renderer/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 CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_
 #define CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 168 matching lines @@
 
   // Allows the embedder to override the WebSpeechSynthesizer used.
   // If it returns NULL the content layer will provide an engine.
   virtual blink::WebSpeechSynthesizer* OverrideSpeechSynthesizer(
       blink::WebSpeechSynthesizerClient* client);
 
   // Returns true if the renderer process should schedule the idle handler when
   // all widgets are hidden.
   virtual bool RunIdleHandlerWhenWidgetsHidden();
 
+  // Returns true if the renderer process should allow shared timer suspension
+  // after the process has been backgrounded. Defaults to false.
+  virtual bool AllowTimerSuspensionWhenProcessBackgrounded();
+
   // Returns true if a popup window should be allowed.
   virtual bool AllowPopup();
 
   // Returns true if we should fork a new process for the given navigation.
   // If |send_referrer| is set to false (which is the default), no referrer
   // header will be send for the navigation. Otherwise, the referrer header is
   // set according to the frame's referrer policy.
   virtual bool ShouldFork(blink::WebLocalFrame* frame,
                           const GURL& url,
                           const std::string& http_method,
@@ skipping 99 matching lines @@
       const GURL& url) {}
 
   // Notifies that a service worker context will be destroyed. This function
   // is called from the worker thread.
   virtual void WillDestroyServiceWorkerContextOnWorkerThread(const GURL& url) {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_RENDERER_CONTENT_RENDERER_CLIENT_H_