Remove obsolete friend declarations for MSVC.

third_party/WebKit/Source/platform/graphics/ImageDecodingStore.h

 /*
  * Copyright (C) 2012 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:
  * 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 199 matching lines @@
 
     // Protect concurrent access to these members:
     //   m_orderedCacheList
     //   m_decoderCacheMap and all CacheEntrys stored in it
     //   m_decoderCacheKeyMap
     //   m_heapLimitInBytes
     //   m_heapMemoryUsageInBytes
     // This mutex also protects calls to underlying skBitmap's
     // lockPixels()/unlockPixels() as they are not threadsafe.
     Mutex m_mutex;
-
-#if COMPILER(MSVC)
-    friend struct ::WTF::OwnedPtrDeleter<CacheEntry>;
-    friend struct ::WTF::OwnedPtrDeleter<DecoderCacheEntry>;
-#endif
 };
 
 } // namespace blink
 
 #endif