MSan: disable zapping of freelist entries.

third_party/WebKit/Source/platform/heap/HeapPage.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 619 matching lines @@
     void addToFreeList(Address, size_t);
     void clear();
 
     // Returns a bucket number for inserting a FreeListEntry of a given size.
     // All FreeListEntries in the given bucket, n, have size >= 2^n.
     static int bucketIndexForSize(size_t);
 
     // Returns true if the freelist snapshot is captured.
     bool takeSnapshot(const String& dumpBaseName);
 
-#if ENABLE(ASSERT) || defined(LEAK_SANITIZER) || defined(ADDRESS_SANITIZER) || defined(MEMORY_SANITIZER)
+#if (ENABLE(ASSERT) || defined(LEAK_SANITIZER) || defined(ADDRESS_SANITIZER)) && !defined(MEMORY_SANITIZER)
     static void zapFreedMemory(Address, size_t);
     static void checkFreedMemoryIsZapped(Address, size_t);
 #endif
 
 private:
     int m_biggestFreeListIndex;
 
     // All FreeListEntries in the nth list have size >= 2^n.
     FreeListEntry* m_freeLists[blinkPageSizeLog2];
 
@@ skipping 261 matching lines @@
         SET_MEMORY_ACCESSIBLE(result, allocationSize - sizeof(HeapObjectHeader));
         ASSERT(findPageFromAddress(headerAddress + allocationSize - 1));
         return result;
     }
     return outOfLineAllocate(allocationSize, gcInfoIndex);
 }
 
 } // namespace blink
 
 #endif // HeapPage_h