Removing duplicate 'using namespace blink;' in platform and web

Source/web/PopupContainerTest.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:
  * 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 11 matching lines @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "web/PopupContainer.h"
 
 #include <gtest/gtest.h>
 
 using namespace blink;
-using namespace blink;
 
 class MockPopupContent : public PopupContent {
 public:
     virtual void setMaxHeight(int max) OVERRIDE { maxHeight = max; }
     virtual int popupContentHeight() const OVERRIDE { return height; }
     virtual ~MockPopupContent() { }
 
     virtual void layout() OVERRIDE
     {
         layoutCount++;
@@ skipping 145 matching lines @@
     {
         // Test for --webkit-transform:rotate(-53deg).
         IntRect initialRect(100, 700, targetControlWidth, 258);
         MockPopupContent content(initialRect.size());
         IntSize transformOffset(4, -8);
         IntRect resultRect = calculatePositionWithTransformAndRTL(initialRect, transformOffset, 104, &content);
         EXPECT_EQ(IntRect(96, 430, targetControlWidth, 258), resultRect);
         EXPECT_EQ(0u, content.layoutCount);
     }
 }