Removing Unused function from ImageDecodingStore class

Source/platform/graphics/ImageDecodingStore.cpp

 /*
  * 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 160 matching lines @@
     MutexLocker lock(m_mutex);
     return m_heapMemoryUsageInBytes;
 }
 
 int ImageDecodingStore::cacheEntries()
 {
     MutexLocker lock(m_mutex);
     return m_decoderCacheMap.size();
 }
 
-int ImageDecodingStore::decoderCacheEntries()
-{
-    MutexLocker lock(m_mutex);
-    return m_decoderCacheMap.size();
-}
-
 void ImageDecodingStore::prune()
 {
     TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("blink.image_decoding"), "ImageDecodingStore::prune");
 
     Vector<OwnPtr<CacheEntry>> cacheEntriesToDelete;
     {
         MutexLocker lock(m_mutex);
 
         // Head of the list is the least recently used entry.
         const CacheEntry* cacheEntry = m_orderedCacheList.head();
@@ skipping 85 matching lines @@
     }
 }
 
 void ImageDecodingStore::removeFromCacheListInternal(const Vector<OwnPtr<CacheEntry>>& deletionList)
 {
     for (size_t i = 0; i < deletionList.size(); ++i)
         m_orderedCacheList.remove(deletionList[i].get());
 }
 
 } // namespace blink