Add more missing closing namespace comments.

third_party/WebKit/Source/core/fetch/MemoryCache.h

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller <mueller@kde.org>
     Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
 
     This library is free software; you can redistribute it and/or
     modify it under the terms of the GNU Library General Public
     License as published by the Free Software Foundation; either
     version 2 of the License, or (at your option) any later version.
 
@@ skipping 107 matching lines @@
 struct MemoryCacheLRUList final {
     DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
 public:
     Member<MemoryCacheEntry> m_head;
     Member<MemoryCacheEntry> m_tail;
 
     MemoryCacheLRUList() : m_head(nullptr), m_tail(nullptr) { }
     DECLARE_TRACE();
 };
 
-}
+} // namespace blink
 
 WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(blink::MemoryCacheLRUList);
 
 namespace blink {
 
 class CORE_EXPORT MemoryCache final : public GarbageCollectedFinalized<MemoryCache>, public WebThread::TaskObserver {
     WTF_MAKE_NONCOPYABLE(MemoryCache);
 public:
     static MemoryCache* create();
     ~MemoryCache();
@@ skipping 187 matching lines @@
 #endif
 };
 
 // Returns the global cache.
 CORE_EXPORT MemoryCache* memoryCache();
 
 // Sets the global cache, used to swap in a test instance. Returns the old
 // MemoryCache object.
 CORE_EXPORT MemoryCache* replaceMemoryCacheForTesting(MemoryCache*);
 
-}
+} // namespace blink
 
 #endif