Decouple Power Monitor from //content.

content/child/power_monitor_broadcast_source.h

-// Copyright (c) 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_CHILD_POWER_MONITOR_BROADCAST_SOURCE_H_
-#define CONTENT_CHILD_POWER_MONITOR_BROADCAST_SOURCE_H_
-
-#include "base/macros.h"
-#include "base/power_monitor/power_monitor_source.h"
-#include "content/common/content_export.h"
-#include "device/power_monitor/public/interfaces/power_monitor.mojom.h"
-#include "mojo/public/cpp/bindings/binding.h"
-
-namespace content {
-
-// Receives Power Monitor IPC messages sent from the browser process and relays
-// them to the PowerMonitor of the current process.
-class CONTENT_EXPORT PowerMonitorBroadcastSource
-    : public base::PowerMonitorSource,
-      NON_EXPORTED_BASE(public device::mojom::PowerMonitorClient) {
- public:
-  explicit PowerMonitorBroadcastSource();
-  ~PowerMonitorBroadcastSource() override;
-
-  void PowerStateChange(bool on_battery_power) override;
-  void Suspend() override;
-  void Resume() override;
-
- private:
-  bool IsOnBatteryPowerImpl() override;
-  bool last_reported_battery_power_state_;
-  mojo::Binding<device::mojom::PowerMonitorClient> binding_;
-
-  DISALLOW_COPY_AND_ASSIGN(PowerMonitorBroadcastSource);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_POWER_MONITOR_BROADCAST_SOURCE_H_