Fix unit test style in Source/web/.

Source/web/tests/ViewportTest.cpp

Index: Source/web/tests/ViewportTest.cpp
diff --git a/Source/web/tests/ViewportTest.cpp b/Source/web/tests/ViewportTest.cpp
index f922c30d3fd191ca2a12ca0e68a58b27f4c55f95..9d1352eaf7857fbb007537d73b58920a6f884259 100644
--- a/Source/web/tests/ViewportTest.cpp
+++ b/Source/web/tests/ViewportTest.cpp
@@ -51,14 +51,12 @@
 #include "public/web/WebViewClient.h"
 #include "web/tests/FrameTestHelpers.h"
 #include <gtest/gtest.h>
-
 #include <vector>
 
-namespace {
+namespace blink {
 
 using blink::FrameTestHelpers::UseMockScrollbarSettings;
 using blink::testing::runPendingTasks;
-using namespace blink;
 
 class ViewportTest : public ::testing::Test {
 protected:
@@ -68,7 +66,7 @@ protected:
     {
     }
 
-    virtual ~ViewportTest()
+    ~ViewportTest() override
     {
         Platform::current()->unitTestSupport()->unregisterAllMockedURLs();
     }
@@ -3156,4 +3154,4 @@ TEST_F(ViewportTest, viewportWarnings7)
     EXPECT_EQ(0U, webFrameClient.messages.size());
 }
 
-} // namespace
+} // namespace blink