Add more missing closing namespace comments.

third_party/WebKit/Source/core/loader/ProgressTracker.cpp

 /*
  * Copyright (C) 2007 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 260 matching lines @@
     if (!item)
         return;
 
     // Adjust the total expected bytes to account for any overage/underage.
     long long delta = item->bytesReceived - item->estimatedLength;
     m_totalPageAndResourceBytesToLoad += delta;
 
     m_progressItems.remove(identifier);
 }
 
-}
+} // namespace blink