Revert of Wake Lock API implementation (Chromium part)

content/renderer/wake_lock/wake_lock_dispatcher.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_RENDERER_WAKE_LOCK_WAKE_LOCK_DISPATCHER_H_
-#define CONTENT_RENDERER_WAKE_LOCK_WAKE_LOCK_DISPATCHER_H_
-
-#include "content/common/wake_lock_service.mojom.h"
-#include "content/public/renderer/render_frame_observer.h"
-#include "third_party/WebKit/public/platform/modules/wake_lock/WebWakeLockClient.h"
-
-namespace content {
-
-// WakeLockDispatcher sends wake lock messages to the browser process using the
-// Mojo WakeLockService.
-class WakeLockDispatcher
-    : public RenderFrameObserver,
-      public blink::WebWakeLockClient {
- public:
-  explicit WakeLockDispatcher(RenderFrame* render_frame);
-  ~WakeLockDispatcher() override;
-
- private:
-  // WebWakeLockClient implementation.
-  virtual void requestKeepScreenAwake(bool keepScreenAwake);
-
-  WakeLockServicePtr wake_lock_service_;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_RENDERER_WAKE_LOCK_WAKE_LOCK_DISPATCHER_H_