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

Source/core/rendering/RenderScrollbarPart.cpp

Index: Source/core/rendering/RenderScrollbarPart.cpp
diff --git a/Source/core/rendering/RenderScrollbarPart.cpp b/Source/core/rendering/RenderScrollbarPart.cpp
index 927079a1fdff09b7eba07e8f4eb25d91af3728e2..3a1fde123aa25bc76584d5dd8054a13eddc80811 100644
--- a/Source/core/rendering/RenderScrollbarPart.cpp
+++ b/Source/core/rendering/RenderScrollbarPart.cpp
@@ -32,8 +32,6 @@
 #include "core/rendering/RenderView.h"
 #include "platform/LengthFunctions.h"
 
-using namespace std;
-
 namespace WebCore {
 
 RenderScrollbarPart::RenderScrollbarPart(RenderScrollbar* scrollbar, ScrollbarPart part)
@@ -104,7 +102,7 @@ void RenderScrollbarPart::computeScrollbarWidth()
     int w = calcScrollbarThicknessUsing(MainOrPreferredSize, style()->width(), visibleSize);
     int minWidth = calcScrollbarThicknessUsing(MinSize, style()->minWidth(), visibleSize);
     int maxWidth = style()->maxWidth().isUndefined() ? w : calcScrollbarThicknessUsing(MaxSize, style()->maxWidth(), visibleSize);
-    setWidth(max(minWidth, min(maxWidth, w)));
+    setWidth(std::max(minWidth, std::min(maxWidth, w)));
 
     // Buttons and track pieces can all have margins along the axis of the scrollbar.
     m_marginBox.setLeft(minimumValueForLength(style()->marginLeft(), visibleSize));
@@ -121,7 +119,7 @@ void RenderScrollbarPart::computeScrollbarHeight()
     int h = calcScrollbarThicknessUsing(MainOrPreferredSize, style()->height(), visibleSize);
     int minHeight = calcScrollbarThicknessUsing(MinSize, style()->minHeight(), visibleSize);
     int maxHeight = style()->maxHeight().isUndefined() ? h : calcScrollbarThicknessUsing(MaxSize, style()->maxHeight(), visibleSize);
-    setHeight(max(minHeight, min(maxHeight, h)));
+    setHeight(std::max(minHeight, std::min(maxHeight, h)));
 
     // Buttons and track pieces can all have margins along the axis of the scrollbar.
     m_marginBox.setTop(minimumValueForLength(style()->marginTop(), visibleSize));