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

Source/web/tests/PinchViewportTest.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "core/frame/PinchViewport.h"
 
 #include "core/frame/FrameHost.h"
 #include "core/frame/LocalFrame.h"
@@ skipping 50 matching lines @@
 #define EXPECT_FLOAT_RECT_EQ(expected, actual) \
     do { \
         EXPECT_FLOAT_EQ((expected).x(), (actual).x()); \
         EXPECT_FLOAT_EQ((expected).y(), (actual).y()); \
         EXPECT_FLOAT_EQ((expected).width(), (actual).width()); \
         EXPECT_FLOAT_EQ((expected).height(), (actual).height()); \
     } while (false)
 
 
 using namespace blink;
-using namespace blink;
 
 using ::testing::_;
 using ::testing::PrintToString;
 using ::testing::Mock;
 
 namespace blink {
 ::std::ostream& operator<<(::std::ostream& os, const WebContextMenuData& data)
 {
     return os << "Context menu location: ["
         << data.mousePosition.x << ", " << data.mousePosition.y << "]";
@@ skipping 712 matching lines @@
     pinchViewport.scrollIntoView(FloatRect(50, 75, 50, 75));
     EXPECT_POINT_EQ(IntPoint(50, 75), frame()->view()->scrollPosition());
     EXPECT_FLOAT_POINT_EQ(FloatPoint(), pinchViewport.visibleRect().location());
 
     pinchViewport.scrollIntoView(FloatRect(190, 290, 10, 10));
     EXPECT_POINT_EQ(IntPoint(100, 150), frame()->view()->scrollPosition());
     EXPECT_FLOAT_POINT_EQ(FloatPoint(50, 75), pinchViewport.visibleRect().location());
 }
 
 } // namespace