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

Source/core/page/TouchDisambiguation.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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 27 matching lines @@
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/HTMLHtmlElement.h"
 #include "core/page/EventHandler.h"
 #include "core/rendering/HitTestResult.h"
 #include "core/rendering/RenderBlock.h"
 
+using namespace std;
+
 namespace WebCore {
 
 static IntRect boundingBoxForEventNodes(Node* eventNode)
 {
     if (!eventNode->document().view())
         return IntRect();
 
     IntRect result;
     Node* node = eventNode;
     while (node) {
@@ skipping 10 matching lines @@
 
 static float scoreTouchTarget(IntPoint touchPoint, int padding, IntRect boundingBox)
 {
     if (boundingBox.isEmpty())
         return 0;
 
     float reciprocalPadding = 1.f / padding;
     float score = 1;
 
     IntSize distance = boundingBox.differenceToPoint(touchPoint);
-    score *= std::max((padding - std::abs(distance.width())) * reciprocalPadding, 0.f);
-    score *= std::max((padding - std::abs(distance.height())) * reciprocalPadding, 0.f);
+    score *= max((padding - abs(distance.width())) * reciprocalPadding, 0.f);
+    score *= max((padding - abs(distance.height())) * reciprocalPadding, 0.f);
 
     return score;
 }
 
 struct TouchTargetData {
     IntRect windowBoundingBox;
     float score;
 };
 
 void findGoodTouchTargets(const IntRect& touchBox, LocalFrame* mainFrame, Vector<IntRect>& goodTargets, WillBeHeapVector<RawPtrWillBeMember<Node> >& highlightNodes)
 {
     goodTargets.clear();
 
-    int touchPointPadding = ceil(std::max(touchBox.width(), touchBox.height()) * 0.5);
+    int touchPointPadding = ceil(max(touchBox.width(), touchBox.height()) * 0.5);
 
     IntPoint touchPoint = touchBox.center();
     IntPoint contentsPoint = mainFrame->view()->windowToContents(touchPoint);
 
     HitTestResult result = mainFrame->eventHandler().hitTestResultAtPoint(contentsPoint, HitTestRequest::ReadOnly | HitTestRequest::Active | HitTestRequest::ConfusingAndOftenMisusedDisallowShadowContent, IntSize(touchPointPadding, touchPointPadding));
     const WillBeHeapListHashSet<RefPtrWillBeMember<Node> >& hitResults = result.rectBasedTestResult();
 
     // Blacklist nodes that are container of disambiguated nodes.
     // It is not uncommon to have a clickable <div> that contains other clickable objects.
     // This heuristic avoids excessive disambiguation in that case.
@@ skipping 19 matching lines @@
     for (WillBeHeapListHashSet<RefPtrWillBeMember<Node> >::const_iterator it = hitResults.begin(); it != hitResults.end(); ++it) {
         for (Node* node = it->get(); node; node = node->parentNode()) {
             if (blackList.contains(node))
                 continue;
             if (node->isDocumentNode() || isHTMLHtmlElement(*node) || isHTMLBodyElement(*node))
                 break;
             if (node->willRespondToMouseClickEvents()) {
                 TouchTargetData& targetData = touchTargets.add(node, TouchTargetData()).storedValue->value;
                 targetData.windowBoundingBox = boundingBoxForEventNodes(node);
                 targetData.score = scoreTouchTarget(touchPoint, touchPointPadding, targetData.windowBoundingBox);
-                bestScore = std::max(bestScore, targetData.score);
+                bestScore = max(bestScore, targetData.score);
                 break;
             }
         }
     }
 
     for (WillBeHeapHashMap<RawPtrWillBeMember<Node>, TouchTargetData>::iterator it = touchTargets.begin(); it != touchTargets.end(); ++it) {
         // Currently the scoring function uses the overlap area with the fat point as the score.
         // We ignore the candidates that has less than 1/2 overlap (we consider not really ambiguous enough) than the best candidate to avoid excessive popups.
         if (it->value.score < bestScore * 0.5)
             continue;
         goodTargets.append(it->value.windowBoundingBox);
         highlightNodes.append(it->key);
     }
 }
 
 } // namespace WebCore