Simpler return value of HashTable::add/HashMap:add and others

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 349 matching lines @@
         m_discardableMemoryUsageInBytes += cacheEntryBytes;
     else
         m_heapMemoryUsageInBytes += cacheEntryBytes;
 
     // m_orderedCacheList is used to support LRU operations to reorder cache
     // entries quickly.
     m_orderedCacheList.append(cacheEntry.get());
 
     typename U::KeyType key = cacheEntry->cacheKey();
     typename V::AddResult result = identifierMap->add(cacheEntry->generator(), typename V::MappedType());
-    result.iterator->value.add(key);
+    result.storedValue->value.add(key);
     cacheMap->add(key, cacheEntry);
 
     TRACE_COUNTER1("webkit", "ImageDecodingStoreDiscardableMemoryUsageBytes", m_discardableMemoryUsageInBytes);
     TRACE_COUNTER1("webkit", "ImageDecodingStoreHeapMemoryUsageBytes", m_heapMemoryUsageInBytes);
     TRACE_COUNTER1("webkit", "ImageDecodingStoreNumOfImages", m_imageCacheMap.size());
     TRACE_COUNTER1("webkit", "ImageDecodingStoreNumOfDecoders", m_decoderCacheMap.size());
 }
 
 template<class T, class U, class V>
 void ImageDecodingStore::removeFromCacheInternal(const T* cacheEntry, U* cacheMap, V* identifierMap, Vector<OwnPtr<CacheEntry> >* deletionList)
@@ skipping 55 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 WebCore