Stop using WebCore namespace in generated code

Source/modules/geolocation/testing/GeolocationClientMock.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2012 Apple Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 166 matching lines @@
             (*it)->errorOccurred(GeolocationError::create(GeolocationError::PositionUnavailable, m_errorMessage));
     }
 }
 
 void GeolocationClientMock::clearError()
 {
     m_hasError = false;
     m_errorMessage = String();
 }
 
-} // WebCore
+} // namespace blink