Fix unit test style in Source/web/.

Source/web/tests/ProgrammaticScrollTest.cpp

 #include "config.h"
 
 #include "core/frame/FrameView.h"
 #include "core/layout/LayoutView.h"
 #include "platform/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;
-
-namespace {
+namespace blink {
 
 class MockWebFrameClient : public WebFrameClient {
 };
 
 class ProgrammaticScrollTest : public testing::Test {
 public:
     ProgrammaticScrollTest()
         : m_baseURL("http://www.test.com/")
     {
     }
 
-    virtual void TearDown()
+    void TearDown() override
     {
         Platform::current()->unitTestSupport()->unregisterAllMockedURLs();
     }
 
 protected:
 
     void registerMockedHttpURLLoad(const std::string& fileName)
     {
         URLTestHelpers::registerMockedURLFromBaseURL(WebString::fromUTF8(m_baseURL.c_str()), WebString::fromUTF8(fileName.c_str()));
     }
@@ skipping 51 matching lines @@
     frame->loader().currentItem()->setScrollPoint(WebPoint(0, 400));
 
     // FrameLoader::restoreScrollPositionAndViewState flows differently if scale is zero.
     frame->loader().restoreScrollPositionAndViewState();
 
     // Expect that only the scroll position was restored.
     EXPECT_EQ(3.0f, webViewImpl->pageScaleFactor());
     EXPECT_EQ(400, webViewImpl->mainFrameImpl()->scrollOffset().height);
 }
 
-}
+} // namespace blink