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

Source/web/tests/ProgrammaticScrollTest.cpp

 #include "config.h"
 
 #include "core/frame/FrameView.h"
 #include "core/rendering/RenderView.h"
 #include "core/testing/URLTestHelpers.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebUnitTestSupport.h"
 #include "public/web/WebFrame.h"
 #include "public/web/WebFrameClient.h"
 #include "public/web/WebHistoryItem.h"
 #include "public/web/WebInputEvent.h"
 #include "public/web/WebScriptSource.h"
 #include "public/web/WebSettings.h"
 #include "public/web/WebView.h"
 #include "web/WebLocalFrameImpl.h"
 #include "web/WebViewImpl.h"
 #include "web/tests/FrameTestHelpers.h"
 #include <gtest/gtest.h>
 
 using namespace blink;
-using namespace blink;
 
 namespace {
 
 class MockWebFrameClient : public WebFrameClient {
 };
 
 class ProgrammaticScrollTest : public testing::Test {
 public:
     ProgrammaticScrollTest()
         : m_baseURL("http://www.test.com/")
@@ skipping 68 matching lines @@
     // FrameLoader::restoreScrollPositionAndViewState flows differently if scale is zero.
     frame->loader().restoreScrollPositionAndViewState();
 
     // Expect that only the scroll position was restored, and that it was not a programmatic scroll.
     EXPECT_EQ(3.0f, webViewImpl->pageScaleFactor());
     EXPECT_EQ(400, webViewImpl->mainFrameImpl()->scrollOffset().height);
     EXPECT_TRUE(frame->view()->wasScrolledByUser());
 }
 
 }