Reland of Pass SequencedTaskRunner to PowerSaveBlocker for ui/file ops

content/public/browser/power_save_blocker.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_BROWSER_POWER_SAVE_BLOCKER_H_
 #define CONTENT_PUBLIC_BROWSER_POWER_SAVE_BLOCKER_H_
 
 #include <memory>
 #include <string>
 
+#include "base/memory/ref_counted.h"
+#include "base/sequenced_task_runner.h"
+#include "base/single_thread_task_runner.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
 // A RAII-style class to block the system from entering low-power (sleep) mode.
 // This class is thread-safe; it may be constructed and deleted on any thread.
 class CONTENT_EXPORT PowerSaveBlocker {
  public:
   enum PowerSaveBlockerType {
     // Prevent the application from being suspended. On some platforms, apps may
@@ skipping 20 matching lines @@
     kReasonOther,
   };
 
   virtual ~PowerSaveBlocker() = 0;
 
   // Pass in the type of power save blocking desired. If multiple types of
   // blocking are desired, instantiate one PowerSaveBlocker for each type.
   // |reason| and |description| (a more-verbose, human-readable justification of
   // the blocking) may be provided to the underlying system APIs on some
   // platforms.
-  static std::unique_ptr<PowerSaveBlocker> Create(
+  static std::unique_ptr<PowerSaveBlocker> CreateWithTaskRunners(
       PowerSaveBlockerType type,
       Reason reason,
-      const std::string& description);
+      const std::string& description,
+      scoped_refptr<base::SequencedTaskRunner> ui_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> file_task_runner);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_POWER_SAVE_BLOCKER_H_