Add more missing closing namespace comments.

third_party/WebKit/Source/core/css/MediaValuesTest.cpp

 // Use of this source code is governed by a BSD-style license that can be
 // Copyright 2014 The Chromium Authors. All rights reserved.
 // found in the LICENSE file.
 
 #include "core/css/MediaValues.h"
 
 #include "core/css/CSSPrimitiveValue.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "wtf/text/StringBuilder.h"
 
@@ skipping 39 matching lines @@
             testCases[i].fontSize,
             testCases[i].viewportWidth,
             testCases[i].viewportHeight,
             output);
         ASSERT_EQ(testCases[i].success, success);
         if (success)
             ASSERT_EQ(testCases[i].output, output);
     }
 }
 
-} // namespace
+} // namespace blink