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

Source/platform/image-decoders/webp/WEBPImageDecoderTest.cpp

 /*
  * Copyright (C) 2013 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 28 matching lines @@
 #include "public/platform/WebSize.h"
 #include "public/platform/WebUnitTestSupport.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/StringHasher.h"
 #include "wtf/Vector.h"
 #include "wtf/dtoa/utils.h"
 #include <gtest/gtest.h>
 
 using namespace blink;
-using namespace blink;
 
 namespace {
 
 PassRefPtr<SharedBuffer> readFile(const char* fileName)
 {
     String filePath = Platform::current()->unitTestSupport()->webKitRootDir();
     filePath.append(fileName);
 
     return Platform::current()->unitTestSupport()->readFromFile(filePath);
 }
@@ skipping 596 matching lines @@
 
 TEST(StaticWebPTests, notAnimated)
 {
     OwnPtr<WEBPImageDecoder> decoder = createDecoder();
     RefPtr<SharedBuffer> data = readFile("/LayoutTests/fast/images/resources/webp-color-profile-lossy.webp");
     ASSERT_TRUE(data.get());
     decoder->setData(data.get(), true);
     EXPECT_EQ(1u, decoder->frameCount());
     EXPECT_EQ(cAnimationNone, decoder->repetitionCount());
 }