Fix unit test style in core/{dom,editing,html}/.

Source/core/html/LinkRelAttributeTest.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 12 matching lines @@
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/html/LinkRelAttribute.h"
+
 #include "platform/RuntimeEnabledFeatures.h"
-
 #include "wtf/text/CString.h"
 #include <gtest/gtest.h>
 
-using namespace blink;
-
-namespace {
+namespace blink {
 
 class LinkRelAttributeTest : public testing::Test {
 protected:
-    virtual void SetUp()
+    void SetUp() override
     {
         m_touchIconLoadingEnabled = RuntimeEnabledFeatures::touchIconLoadingEnabled();
         m_presentationEnabled = RuntimeEnabledFeatures::presentationEnabled();
     }
 
-    virtual void TearDown()
+    void TearDown() override
     {
         RuntimeEnabledFeatures::setTouchIconLoadingEnabled(m_touchIconLoadingEnabled);
         RuntimeEnabledFeatures::setPresentationEnabled(m_presentationEnabled);
     }
 
 private:
     bool m_touchIconLoadingEnabled;
     bool m_presentationEnabled;
 };
 
@@ skipping 87 matching lines @@
 
 TEST_F(LinkRelAttributeTest, ConstructorDefaultPresentation)
 {
     RuntimeEnabledFeatures::setPresentationEnabled(false);
     EXPECT_FALSE(LinkRelAttribute("default-presentation").isDefaultPresentation());
 
     RuntimeEnabledFeatures::setPresentationEnabled(true);
     EXPECT_TRUE(LinkRelAttribute("default-presentation").isDefaultPresentation());
 }
 
-} // namespace
+} // namespace blink