Revert of Wake Lock API implementation (Chromium part)

content/browser/wake_lock/wake_lock_service_context.h

-// Copyright 2015 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_BROWSER_WAKE_LOCK_WAKE_LOCK_SERVICE_CONTEXT_H_
-#define CONTENT_BROWSER_WAKE_LOCK_WAKE_LOCK_SERVICE_CONTEXT_H_
-
-#include <set>
-
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "content/browser/wake_lock/wake_lock_service_impl.h"
-#include "content/common/content_export.h"
-#include "content/public/browser/web_contents_observer.h"
-#include "mojo/public/cpp/bindings/interface_request.h"
-
-namespace content {
-
-class PowerSaveBlocker;
-class RenderFrameHost;
-class WebContents;
-
-class CONTENT_EXPORT WakeLockServiceContext: public WebContentsObserver {
- public:
-  explicit WakeLockServiceContext(WebContents* web_contents);
-  ~WakeLockServiceContext() override;
-
-  // Creates a WakeLockServiceImpl that is strongly bound to |request|.
-  void CreateService(int frame_id,
-                     mojo::InterfaceRequest<WakeLockService> request);
-
-  // WebContentsObserver implementation.
-  void RenderFrameDeleted(RenderFrameHost* render_frame_host) override;
-
-  // Requests wake lock for |frame_id|.
-  void RequestWakeLock(int frame_id);
-
-  // Cancels wake lock request for |frame_id|.
-  void CancelWakeLock(int frame_id);
-
-  // Used by tests.
-  bool HasWakeLockForTests() const;
-
- private:
-  void CreateWakeLock();
-  void RemoveWakeLock();
-  void UpdateWakeLock();
-
-  // Set of all FrameTreeNode ids currently requesting wake lock.
-  std::set<int> frames_requesting_lock_;
-
-  // The actual power save blocker for screen.
-  scoped_ptr<PowerSaveBlocker> wake_lock_;
-
-  base::WeakPtrFactory<WakeLockServiceContext> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(WakeLockServiceContext);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_WAKE_LOCK_WAKE_LOCK_SERVICE_CONTEXT_H_