Add more missing closing namespace comments.

third_party/WebKit/Source/core/layout/LayoutBlockTest.cpp

 // Copyright 2014 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 "core/layout/LayoutBlock.h"
 
 #include "core/layout/LayoutBlockFlow.h"
 #include "core/layout/LayoutTestHelper.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace blink {
 
 class LayoutBlockTest : public RenderingTest {
 };
 
 TEST_F(LayoutBlockTest, LayoutNameCalledWithNullStyle)
 {
     LayoutObject* obj = LayoutBlockFlow::createAnonymous(&document());
     EXPECT_FALSE(obj->style());
     EXPECT_STREQ("LayoutBlockFlow (anonymous)", obj->decoratedName().ascii().data());
     obj->destroy();
 }
 
-}
+} // namespace blink