Removing "using" declarations that import names in the C++ Standard library.

Source/core/editing/htmlediting.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Apple 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 39 matching lines @@
 #include "core/html/HTMLOListElement.h"
 #include "core/html/HTMLParagraphElement.h"
 #include "core/html/HTMLTableCellElement.h"
 #include "core/html/HTMLUListElement.h"
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/RenderTableCell.h"
 #include "wtf/Assertions.h"
 #include "wtf/StdLibExtras.h"
 #include "wtf/text/StringBuilder.h"
 
-using namespace std;
-
 namespace WebCore {
 
 using namespace HTMLNames;
 
 // Atomic means that the node has no children, or has children which are ignored for the
 // purposes of editing.
 bool isAtomicNode(const Node *node)
 {
     return node && (!node->hasChildren() || editingIgnoresContent(node));
 }
@@ skipping 291 matching lines @@
 }
 
 String stringWithRebalancedWhitespace(const String& string, bool startIsStartOfParagraph, bool endIsEndOfParagraph)
 {
     unsigned length = string.length();
 
     StringBuilder rebalancedString;
     rebalancedString.reserveCapacity(length);
 
     bool previousCharacterWasSpace = false;
-    for (size_t i = 0; i < length; i++) {
+    for (std::size_t i = 0; i < length; i++) {
         UChar c = string[i];
         if (!isWhitespace(c)) {
             rebalancedString.append(c);
             previousCharacterWasSpace = false;
             continue;
         }
 
         if (previousCharacterWasSpace || (!i && startIsStartOfParagraph) || (i + 1 == length && endIsEndOfParagraph)) {
             rebalancedString.append(noBreakSpace);
             previousCharacterWasSpace = false;
@@ skipping 729 matching lines @@
     // if the selection starts just before a paragraph break, skip over it
     if (isEndOfParagraph(visiblePosition))
         return visiblePosition.next().deepEquivalent().downstream();
 
     // otherwise, make sure to be at the start of the first selected node,
     // instead of possibly at the end of the last node before the selection
     return visiblePosition.deepEquivalent().downstream();
 }
 
 } // namespace WebCore