components: Use stl utilities from the base namespace

components/proximity_auth/bluetooth_throttler_impl.cc

Index: components/proximity_auth/bluetooth_throttler_impl.cc
diff --git a/components/proximity_auth/bluetooth_throttler_impl.cc b/components/proximity_auth/bluetooth_throttler_impl.cc
index 7f6b10558970d598bc498962c2df7ad87b5a5e5c..da4816dae9bbd72a49c7f060b81b7361eb1409a9 100644
--- a/components/proximity_auth/bluetooth_throttler_impl.cc
+++ b/components/proximity_auth/bluetooth_throttler_impl.cc
@@ -42,7 +42,7 @@ base::TimeDelta BluetoothThrottlerImpl::GetDelay() const {
 }
 
 void BluetoothThrottlerImpl::OnConnection(Connection* connection) {
-  DCHECK(!ContainsKey(connections_, connection));
+  DCHECK(!base::ContainsKey(connections_, connection));
   connections_.insert(connection);
   connection->AddObserver(this);
 }
@@ -55,7 +55,7 @@ void BluetoothThrottlerImpl::OnConnectionStatusChanged(
     Connection* connection,
     Connection::Status old_status,
     Connection::Status new_status) {
-  DCHECK(ContainsKey(connections_, connection));
+  DCHECK(base::ContainsKey(connections_, connection));
   if (new_status == Connection::DISCONNECTED) {
     last_disconnect_time_ = clock_->NowTicks();
     connection->RemoveObserver(this);