Privatize StrongBinding lifetime management

device/battery/battery_monitor_impl.cc

Index: device/battery/battery_monitor_impl.cc
diff --git a/device/battery/battery_monitor_impl.cc b/device/battery/battery_monitor_impl.cc
index 7a77c5b14da716fc0763286290a568e3f619f4f2..e27f043bf5a0afbc9640aeadd77d22ebd63d4081 100644
--- a/device/battery/battery_monitor_impl.cc
+++ b/device/battery/battery_monitor_impl.cc
@@ -8,18 +8,17 @@
 
 #include "base/bind.h"
 #include "base/logging.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
 
 namespace device {
 
 // static
-void BatteryMonitorImpl::Create(
-    mojo::InterfaceRequest<BatteryMonitor> request) {
-  new BatteryMonitorImpl(std::move(request));
+void BatteryMonitorImpl::Create(BatteryMonitorRequest request) {
+  mojo::MakeStrongBinding(base::MakeUnique<BatteryMonitorImpl>(),
+                          std::move(request));
 }
 
-BatteryMonitorImpl::BatteryMonitorImpl(
-    mojo::InterfaceRequest<BatteryMonitor> request)
-    : binding_(this, std::move(request)), status_to_report_(false) {
+BatteryMonitorImpl::BatteryMonitorImpl() : status_to_report_(false) {
   // NOTE: DidChange may be called before AddCallback returns. This is done to
   // report current status.
   subscription_ = BatteryStatusService::GetInstance()->AddCallback(