device: Use stl utilities from the base namespace

device/bluetooth/dbus/fake_bluetooth_media_client.cc

Index: device/bluetooth/dbus/fake_bluetooth_media_client.cc
diff --git a/device/bluetooth/dbus/fake_bluetooth_media_client.cc b/device/bluetooth/dbus/fake_bluetooth_media_client.cc
index 246a14097add6c61721cf220ec3ff3f767a302f8..3b7a83b9a19a2c87f55ec8b3e82c7cb88424063f 100644
--- a/device/bluetooth/dbus/fake_bluetooth_media_client.cc
+++ b/device/bluetooth/dbus/fake_bluetooth_media_client.cc
@@ -78,7 +78,7 @@ void FakeBluetoothMediaClient::UnregisterEndpoint(
   // TODO(mcchou): Come up with some corresponding actions.
   VLOG(1) << "UnregisterEndpoint: " << endpoint_path.value();
 
-  if (!ContainsKey(endpoints_, endpoint_path)) {
+  if (!base::ContainsKey(endpoints_, endpoint_path)) {
     error_callback.Run(kFailedError, "Unknown media endpoint");
     return;
   }
@@ -128,7 +128,7 @@ void FakeBluetoothMediaClient::SetEndpointRegistered(
 
 bool FakeBluetoothMediaClient::IsRegistered(
     const dbus::ObjectPath& endpoint_path) {
-  return ContainsKey(endpoints_, endpoint_path);
+  return base::ContainsKey(endpoints_, endpoint_path);
 }
 
 }  // namespace bluez