Add more missing closing namespace comments.

third_party/WebKit/Source/platform/blob/BlobData.cpp

 /*
  * Copyright (C) 2010 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 41 matching lines @@
 bool isValidBlobType(const String& type)
 {
     for (unsigned i = 0; i < type.length(); ++i) {
         UChar c = type[i];
         if (c < 0x20 || c > 0x7E)
             return false;
     }
     return true;
 }
 
-}
+} // namespace
 
 const long long BlobDataItem::toEndOfFile = -1;
 
 RawData::RawData()
 {
 }
 
 void RawData::detachFromCurrentThread()
 {
 }
@@ skipping 145 matching lines @@
 {
     BlobRegistry::addBlobDataRef(m_uuid);
 }
 
 BlobDataHandle::~BlobDataHandle()
 {
     BlobRegistry::removeBlobDataRef(m_uuid);
 }
 
 } // namespace blink