Stop using [Client=...] feature of Mojom for BatteryMonitor

device/battery/battery_monitor_impl.h

Index: device/battery/battery_monitor_impl.h
diff --git a/device/battery/battery_monitor_impl.h b/device/battery/battery_monitor_impl.h
index 7916b0d2b4adb97155844a0d2abfa2b480b422b4..c02f55ef8ecdae3b2d82c80cc53265dac8642717 100644
--- a/device/battery/battery_monitor_impl.h
+++ b/device/battery/battery_monitor_impl.h
@@ -22,10 +22,14 @@ class BatteryMonitorImpl : public BatteryMonitor {
   explicit BatteryMonitorImpl(mojo::InterfaceRequest<BatteryMonitor> request);
   ~BatteryMonitorImpl() override;
 
+  // BatteryMonitor methods:
+  void SetClient(BatteryMonitorClientPtr client) override;
+
   void RegisterSubscription();
   void DidChange(const BatteryStatus& battery_status);
 
   mojo::StrongBinding<BatteryMonitor> binding_;
+  BatteryMonitorClientPtr client_;
   scoped_ptr<BatteryStatusService::BatteryUpdateSubscription> subscription_;
 
   DISALLOW_COPY_AND_ASSIGN(BatteryMonitorImpl);