Flash: Use better APIs for preventing sleep

chrome/browser/renderer_host/pepper/pepper_flash_browser_host.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_BROWSER_RENDERER_HOST_PEPPER_PEPPER_FLASH_BROWSER_HOST_H_
 #define CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_FLASH_BROWSER_HOST_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "base/timer/timer.h"
 #include "ppapi/host/host_message_context.h"
 #include "ppapi/host/resource_host.h"
 
 namespace base {
 class Time;
 }
 
 namespace content {
 class BrowserPpapiHost;
 class ResourceContext;
 }
 
 namespace content_settings {
 class CookieSettings;
 }
 
+namespace device {
+class PowerSaveBlocker;
+}
+
 class GURL;
 
 namespace chrome {
 
 class PepperFlashBrowserHost : public ppapi::host::ResourceHost {
  public:
   PepperFlashBrowserHost(content::BrowserPpapiHost* host,
                          PP_Instance instance,
                          PP_Resource resource);
   ~PepperFlashBrowserHost() override;
 
   // ppapi::host::ResourceHost override.
   int32_t OnResourceMessageReceived(
       const IPC::Message& msg,
       ppapi::host::HostMessageContext* context) override;
 
  private:
+  void OnDelayTimerFired();
   int32_t OnUpdateActivity(ppapi::host::HostMessageContext* host_context);
   int32_t OnGetLocalTimeZoneOffset(
       ppapi::host::HostMessageContext* host_context,
       const base::Time& t);
   int32_t OnGetLocalDataRestrictions(ppapi::host::HostMessageContext* context);
 
   void GetLocalDataRestrictions(
       ppapi::host::ReplyMessageContext reply_context,
       const GURL& document_url,
       const GURL& plugin_url,
       scoped_refptr<content_settings::CookieSettings> cookie_settings);
 
   content::BrowserPpapiHost* host_;
   int render_process_id_;
+
+  // A power save blocker to prevent going to sleep, and a timer to destroy it
+  // after a certain amount of time has elapsed without an UpdateActivity.
+  std::unique_ptr<device::PowerSaveBlocker> power_save_blocker_;
+  base::DelayTimer delay_timer_;
+
   // For fetching the Flash LSO settings.
   scoped_refptr<content_settings::CookieSettings> cookie_settings_;
   base::WeakPtrFactory<PepperFlashBrowserHost> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperFlashBrowserHost);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_FLASH_BROWSER_HOST_H_