Remove some unnecessary 'using namespace'

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

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2012 Apple Inc. All rights
  * reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 12 matching lines @@
 
 #include "core/css/CSSCalculationValue.h"
 #include "core/css/CSSHelper.h"
 #include "core/css/CSSMarkup.h"
 #include "core/css/CSSToLengthConversionData.h"
 #include "core/css/CSSValuePool.h"
 #include "platform/LayoutUnit.h"
 #include "wtf/SizeAssertions.h"
 #include "wtf/StdLibExtras.h"
 
-using namespace WTF;
-
 namespace blink {
 
 namespace {
 
 // Max/min values for CSS, needs to slightly smaller/larger than the true
 // max/min values to allow for rounding without overflowing.
 // Subtract two (rather than one) to allow for values to be converted to float
 // and back without exceeding the LayoutUnit::max.
 const int maxValueForCssLength = INT_MAX / kFixedPointDenominator - 2;
 const int minValueForCssLength = INT_MIN / kFixedPointDenominator + 2;
@@ skipping 663 matching lines @@
     case UnitType::Calc:
       visitor->trace(m_value.calc);
       break;
     default:
       break;
   }
   CSSValue::traceAfterDispatch(visitor);
 }
 
 }  // namespace blink