Flash: Use better APIs for preventing sleep

chrome/browser/renderer_host/pepper/pepper_flash_browser_host.h

Index: chrome/browser/renderer_host/pepper/pepper_flash_browser_host.h
diff --git a/chrome/browser/renderer_host/pepper/pepper_flash_browser_host.h b/chrome/browser/renderer_host/pepper/pepper_flash_browser_host.h
index 50308a2b6186447d1f37eb4cdb6c28fa8efd68db..65f0a61afc90030de0270bc94826da963a8f626d 100644
--- a/chrome/browser/renderer_host/pepper/pepper_flash_browser_host.h
+++ b/chrome/browser/renderer_host/pepper/pepper_flash_browser_host.h
@@ -10,6 +10,7 @@
 #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"
 
@@ -26,6 +27,10 @@ namespace content_settings {
 class CookieSettings;
 }
 
+namespace device {
+class PowerSaveBlocker;
+}
+
 class GURL;
 
 namespace chrome {
@@ -43,6 +48,7 @@ class PepperFlashBrowserHost : public ppapi::host::ResourceHost {
       ppapi::host::HostMessageContext* context) override;
 
  private:
+  void OnDelayTimerFired();
   int32_t OnUpdateActivity(ppapi::host::HostMessageContext* host_context);
   int32_t OnGetLocalTimeZoneOffset(
       ppapi::host::HostMessageContext* host_context,
@@ -57,6 +63,12 @@ class PepperFlashBrowserHost : public ppapi::host::ResourceHost {
 
   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_;