Cleanup namespace usage in Source/web/Web[I-Z]*.cpp

Source/web/WebSurroundingText.cpp

 /*
  * Copyright (C) 2012 Google 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 17 matching lines @@
 #include "core/dom/Element.h"
 #include "core/dom/Node.h"
 #include "core/dom/Range.h"
 #include "core/dom/Text.h"
 #include "core/editing/SurroundingText.h"
 #include "core/editing/VisiblePosition.h"
 #include "core/rendering/RenderObject.h"
 #include "public/platform/WebPoint.h"
 #include "public/web/WebHitTestResult.h"
 
-using namespace blink;
-
 namespace blink {
 
 void WebSurroundingText::initialize(const WebNode& webNode, const WebPoint& nodePoint, size_t maxLength)
 {
     const Node* node = webNode.constUnwrap<Node>();
     if (!node || !node->renderer())
         return;
 
     m_private.reset(new SurroundingText(VisiblePosition(node->renderer()->positionForPoint(static_cast<IntPoint>(nodePoint))).deepEquivalent().parentAnchoredEquivalent(), maxLength));
 }
@@ skipping 34 matching lines @@
 {
     return !m_private.get();
 }
 
 void WebSurroundingText::reset()
 {
     m_private.reset(0);
 }
 
 } // namespace blink