Decouple Power Monitor from //content.

content/browser/power_monitor_message_broadcaster.h

Index: content/browser/power_monitor_message_broadcaster.h
diff --git a/content/browser/power_monitor_message_broadcaster.h b/content/browser/power_monitor_message_broadcaster.h
deleted file mode 100644
index effa1e9e4f6cfc5724be2a0029eecbae0770e820..0000000000000000000000000000000000000000
--- a/content/browser/power_monitor_message_broadcaster.h
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2013 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_POWER_MONITOR_MESSAGE_BROADCASTER_H_
-#define CONTENT_BROWSER_POWER_MONITOR_MESSAGE_BROADCASTER_H_
-
-#include "base/macros.h"
-#include "base/power_monitor/power_observer.h"
-#include "content/common/content_export.h"
-#include "device/power_monitor/public/interfaces/power_monitor.mojom.h"
-
-namespace content {
-
-// A class used to monitor the power state change and communicate it to child
-// processes via IPC.
-class CONTENT_EXPORT PowerMonitorMessageBroadcaster
-    : public base::PowerObserver,
-      NON_EXPORTED_BASE(public device::mojom::PowerMonitor) {
- public:
-  explicit PowerMonitorMessageBroadcaster();
-  ~PowerMonitorMessageBroadcaster() override;
-
-  static void Create(device::mojom::PowerMonitorRequest request);
-
-  // Implement device::mojom::PowerMonitor:
-  void SetClient(
-      device::mojom::PowerMonitorClientPtr power_monitor_client) override;
-
-  // Implement PowerObserver:
-  void OnPowerStateChange(bool on_battery_power) override;
-  void OnSuspend() override;
-  void OnResume() override;
-
- private:
-  device::mojom::PowerMonitorClientPtr power_monitor_client_;
-
-  DISALLOW_COPY_AND_ASSIGN(PowerMonitorMessageBroadcaster);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_POWER_MONITOR_MESSAGE_BROADCASTER_H_