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

Source/core/rendering/RenderRubyBase.cpp

 /*
  * Copyright (C) 2009 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 15 matching lines @@
  * 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/RenderRubyBase.h"
 #include "core/rendering/RenderRubyRun.h"
 
-using namespace std;
-
 namespace WebCore {
 
 RenderRubyBase::RenderRubyBase()
     : RenderBlockFlow(0)
 {
     setInline(false);
 }
 
 RenderRubyBase::~RenderRubyBase()
 {
@@ skipping 94 matching lines @@
         return;
 
     // Inset the ruby base by half the inter-ideograph expansion amount.
     float inset = (logicalWidth - maxPreferredLogicalWidth) / (expansionOpportunityCount + 1);
 
     logicalLeft += inset / 2;
     logicalWidth -= inset;
 }
 
 } // namespace WebCore