[rtp_rtcp] fixed namespaces lint warnings

webrtc/modules/rtp_rtcp/test/BWEStandAlone/MatlabPlot.cc

 /*
  *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include "webrtc/modules/rtp_rtcp/test/BWEStandAlone/MatlabPlot.h"
 
 #include <math.h>
 #include <stdio.h>
 
 #include <algorithm>
 #include <sstream>
 
 #ifdef MATLAB
 #include "engine.h" // NOLINT(build/include)
 #endif
 
 #include "webrtc/system_wrappers/include/critical_section_wrapper.h"
 #include "webrtc/system_wrappers/include/event_wrapper.h"
 #include "webrtc/system_wrappers/include/tick_util.h"
 
-using namespace webrtc;
+using webrtc::CriticalSectionScoped;
+using webrtc::CriticalSectionWrapper;
+using webrtc::EventWrapper;
+using webrtc::TickTime;
 
 #ifdef MATLAB
 MatlabEngine eng;
 
 MatlabLine::MatlabLine(int maxLen /*= -1*/, const char *plotAttrib /*= NULL*/, const char *name /*= NULL*/)
 :
 _xArray(NULL),
 _yArray(NULL),
 _maxLen(maxLen),
 _plotAttribute(),
@@ skipping 1008 matching lines @@
     {
         engClose(ep);
         ep = NULL;
     }
 
     return (true);
 
 }
 
 #endif // MATLAB