Remove some unnecessary 'using namespace'

third_party/WebKit/Source/core/css/CSSBasicShapeValues.cpp

 /*
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above
  *    copyright notice, this list of conditions and the following
  *    disclaimer.
@@ skipping 17 matching lines @@
  */
 
 #include "core/css/CSSBasicShapeValues.h"
 
 #include "core/css/CSSIdentifierValue.h"
 #include "core/css/CSSPrimitiveValue.h"
 #include "core/css/CSSValuePair.h"
 #include "platform/Length.h"
 #include "wtf/text/StringBuilder.h"
 
-using namespace WTF;
-
 namespace blink {
 
 static String buildCircleString(const String& radius,
                                 const String& centerX,
                                 const String& centerY) {
   char at[] = "at";
   char separator[] = " ";
   StringBuilder result;
   result.append("circle(");
   if (!radius.isNull())
@@ skipping 379 matching lines @@
   visitor->trace(m_bottom);
   visitor->trace(m_left);
   visitor->trace(m_topLeftRadius);
   visitor->trace(m_topRightRadius);
   visitor->trace(m_bottomRightRadius);
   visitor->trace(m_bottomLeftRadius);
   CSSValue::traceAfterDispatch(visitor);
 }
 
 }  // namespace blink