Add more missing closing namespace comments.

third_party/WebKit/Source/core/frame/ImageBitmapTest.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 206 matching lines @@
     {
         ASSERT_NE(imageBitmap->bitmapImage()->imageForCurrentFrame(), newImageResource->image()->imageForCurrentFrame());
         SkImage* image1 = imageBitmap->bitmapImage()->imageForCurrentFrame().get();
         ASSERT_NE(image1, nullptr);
         SkImage* image2 = newImageResource->image()->imageForCurrentFrame().get();
         ASSERT_NE(image2, nullptr);
         ASSERT_NE(image1, image2);
     }
 }
 
-} // namespace
+} // namespace blink