Add '.mojom' suffix for battery mojom modules.

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 76511153514e47e5e42960e84a91d5c3ca4363e4..9309175d6639ff8133404014327c389bc5ccf29e 100644
--- a/device/battery/battery_monitor_impl.cc
+++ b/device/battery/battery_monitor_impl.cc
@@ -14,7 +14,7 @@
 namespace device {
 
 // static
-void BatteryMonitorImpl::Create(BatteryMonitorRequest request) {
+void BatteryMonitorImpl::Create(mojom::BatteryMonitorRequest request) {
   auto* impl = new BatteryMonitorImpl;
   auto binding =
       mojo::MakeStrongBinding(base::WrapUnique(impl), std::move(request));
@@ -47,7 +47,7 @@ void BatteryMonitorImpl::QueryNextStatus(
 void BatteryMonitorImpl::RegisterSubscription() {
 }
 
-void BatteryMonitorImpl::DidChange(const BatteryStatus& battery_status) {
+void BatteryMonitorImpl::DidChange(const mojom::BatteryStatus& battery_status) {
   status_ = battery_status;
   status_to_report_ = true;