Honour PartitionAllocReturnNull flag when MEMORY_TOOL_REPLACES_ALLOCATOR

third_party/WebKit/Source/wtf/allocator/PartitionAlloc.h

 /*
  * Copyright (C) 2013 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 716 matching lines @@
     PartitionBucket* bucket = root->bucketLookups[(order << kGenericNumBucketsPerOrderBits) + orderIndex + !!subOrderIndex];
     ASSERT(!bucket->slotSize || bucket->slotSize >= size);
     ASSERT(!(bucket->slotSize % kGenericSmallestBucket));
     return bucket;
 }
 
 ALWAYS_INLINE void* partitionAllocGenericFlags(PartitionRootGeneric* root, int flags, size_t size, const char* typeName)
 {
 #if defined(MEMORY_TOOL_REPLACES_ALLOCATOR)
     void* result = malloc(size);
-    RELEASE_ASSERT(result);
+    RELEASE_ASSERT(result || flags & PartitionAllocReturnNull);
     return result;
 #else
     ASSERT(root->initialized);
     size_t requestedSize = size;
     size = partitionCookieSizeAdjustAdd(size);
     PartitionBucket* bucket = partitionGenericSizeToBucket(root, size);
     void* ret = nullptr;
     {
         SpinLock::Guard guard(root->lock);
         // TODO(bashi): Remove following RELEAE_ASSERT()s once we find the cause of
@@ skipping 121 matching lines @@
 using WTF::partitionAlloc;
 using WTF::partitionFree;
 using WTF::partitionAllocGeneric;
 using WTF::partitionFreeGeneric;
 using WTF::partitionReallocGeneric;
 using WTF::partitionAllocActualSize;
 using WTF::partitionAllocSupportsGetSize;
 using WTF::partitionAllocGetSize;
 
 #endif // WTF_PartitionAlloc_h