Remove "using namespace" statements from headers

Source/core/rendering/line/BreakingContextInlineHeaders.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated.
  *
  * 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 18 matching lines @@
 #include "core/rendering/RenderCombineText.h"
 #include "core/rendering/RenderInline.h"
 #include "core/rendering/break_lines.h"
 #include "core/rendering/line/LineInfo.h"
 #include "core/rendering/line/LineWidth.h"
 #include "core/rendering/shapes/ShapeInsideInfo.h"
 #include "core/rendering/svg/RenderSVGInlineText.h"
 
 namespace WebCore {
 
-using namespace std;
-using namespace WTF;
-using namespace Unicode;
-
 // We don't let our line box tree for a single line get any deeper than this.
 const unsigned cMaxLineDepth = 200;
 
 struct RenderTextInfo {
     RenderTextInfo();
     ~RenderTextInfo();
 
     RenderText* m_text;
     LazyLineBreakIterator m_lineBreakIterator;
     const Font* m_font;
@@ skipping 867 matching lines @@
 
             if (m_autoWrap && betweenWords) {
                 m_width.commit();
                 wrapW = 0;
                 m_lineBreak.moveTo(m_current.object(), m_current.offset(), m_current.nextBreakablePosition());
                 // Auto-wrapping text should not wrap in the middle of a word once it has had an
                 // opportunity to break after a word.
                 breakWords = false;
             }
 
-            if (midWordBreak && !U16_IS_TRAIL(c) && !(category(c) & (Mark_NonSpacing | Mark_Enclosing | Mark_SpacingCombining))) {
+            if (midWordBreak && !U16_IS_TRAIL(c) && !(WTF::Unicode::category(c) & (WTF::Unicode::Mark_NonSpacing | WTF::Unicode::Mark_Enclosing | WTF::Unicode::Mark_SpacingCombining))) {
                 // Remember this as a breakable position in case
                 // adding the end width forces a break.
                 m_lineBreak.moveTo(m_current.object(), m_current.offset(), m_current.nextBreakablePosition());
                 midWordBreak &= (breakWords || breakAll);
             }
 
             if (betweenWords) {
                 lastSpaceWordSpacing = applyWordSpacing ? wordSpacing : 0;
                 wordSpacingForWordMeasurement = (applyWordSpacing && wordMeasurement.width) ? wordSpacing : 0;
                 lastSpace = m_current.offset();
@@ skipping 198 matching lines @@
             m_lineBreak.increment();
         } while (!m_lineBreak.atEnd() && isEmptyInline(m_lineBreak.object()));
     }
 
     return m_lineBreak;
 }
 
 }
 
 #endif // BreakingContextInlineHeaders_h