Bluetooth: Fix error_message parsing on a dbus connect error response.

chromeos/dbus/bluetooth_input_client.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chromeos/dbus/bluetooth_input_client.h"
 
 #include <map>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 191 matching lines @@
   // Called when an error for Connect() is received.
   void OnConnectError(const dbus::ObjectPath& object_path,
                       const ConnectErrorCallback& error_callback,
                       dbus::ErrorResponse* response) {
     // Error response has optional error message argument.
     std::string error_name;
     std::string error_message;
     if (response) {
       dbus::MessageReader reader(response);
       error_name = response->GetErrorName();
-      error_message = reader.PopString(&error_message);
+      reader.PopString(&error_message);
     } else {
       error_name = kNoResponseError;
       error_message = "";
     }
     error_callback.Run(object_path, error_name, error_message);
   }
 
   // Called when a response for Disconnect() is received.
   void OnDisconnect(const dbus::ObjectPath& object_path,
                     const InputCallback& callback,
@@ skipping 62 matching lines @@
     DBusClientImplementationType type,
     dbus::Bus* bus,
     BluetoothAdapterClient* adapter_client) {
   if (type == REAL_DBUS_CLIENT_IMPLEMENTATION)
     return new BluetoothInputClientImpl(bus, adapter_client);
   DCHECK_EQ(STUB_DBUS_CLIENT_IMPLEMENTATION, type);
   return new BluetoothInputClientStubImpl();
 }
 
 }  // namespace chromeos