cc: Fix style for comments at the end of namespaces

cc/math_util_unittest.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "cc/math_util.h"
 
 #include "FloatSize.h"
 #include "cc/test/geometry_test_utils.h"
@@ skipping 163 matching lines @@
     EXPECT_EQ(FloatSize(0, testVector.height()), MathUtil::projectVector(testVector, y));
 
     // Finally check than an arbitrary vector projected to another one gives a vector parallel to
     // the second vector.
     FloatSize targetVector(0.5, 0.2f);
     FloatSize projectedVector = MathUtil::projectVector(testVector, targetVector);
     EXPECT_EQ(projectedVector.width() / targetVector.width(),
               projectedVector.height() / targetVector.height());
 }
 
-} // namespace
+}  // anonymous namespace