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

Source/core/rendering/RenderRubyText.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  * Copyright (C) 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 15 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #include "core/rendering/RenderRubyText.h"
 
-using namespace std;
-
 namespace WebCore {
 
 RenderRubyText::RenderRubyText(Element* element)
     : RenderBlockFlow(element)
 {
 }
 
 RenderRubyText::~RenderRubyText()
 {
 }
@@ skipping 22 matching lines @@
         return RenderBlockFlow::adjustInlineDirectionLineBounds(expansionOpportunityCount, logicalLeft, logicalWidth);
 
     int maxPreferredLogicalWidth = this->maxPreferredLogicalWidth();
     if (maxPreferredLogicalWidth >= logicalWidth)
         return;
 
     // Inset the ruby text by half the inter-ideograph expansion amount, but no more than a full-width
     // ruby character on each side.
     float inset = (logicalWidth - maxPreferredLogicalWidth) / (expansionOpportunityCount + 1);
     if (expansionOpportunityCount)
-        inset = min<float>(2 * style()->fontSize(), inset);
+        inset = std::min<float>(2 * style()->fontSize(), inset);
 
     logicalLeft += inset / 2;
     logicalWidth -= inset;
 }
 
 bool RenderRubyText::avoidsFloats() const
 {
     return true;
 }
 
 } // namespace WebCore