Update code related to OOM errors in sanitizer builds.

base/process/memory.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_PROCESS_MEMORY_H_
 #define BASE_PROCESS_MEMORY_H_
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
 #include "base/process/process_handle.h"
@@ skipping 49 matching lines @@
 // may occur in that case, of course.
 BASE_EXPORT bool AdjustOOMScore(ProcessId process, int score);
 #endif
 
 // Special allocator functions for callers that want to check for OOM.
 // These will not abort if the allocation fails even if
 // EnableTerminationOnOutOfMemory has been called.
 // This can be useful for huge and/or unpredictable size memory allocations.
 // Please only use this if you really handle the case when the allocation
 // fails. Doing otherwise would risk security.
+// These functions may still crash on OOM when running under memory tools,
+// specifically ASan and other sanitizers.
 // Return value tells whether the allocation succeeded. If it fails |result| is
 // set to NULL, otherwise it holds the memory address.
 BASE_EXPORT WARN_UNUSED_RESULT bool UncheckedMalloc(size_t size,
                                                     void** result);
 BASE_EXPORT WARN_UNUSED_RESULT bool UncheckedCalloc(size_t num_items,
                                                     size_t size,
                                                     void** result);
 
 // TODO(b.kelemen): make Skia use the new interface and remove these.
 #if defined(OS_MACOSX)
 BASE_EXPORT void* UncheckedMalloc(size_t size);
 BASE_EXPORT void* UncheckedCalloc(size_t num_items, size_t size);
 #endif
 
 }  // namespace base
 
 #endif  // BASE_PROCESS_MEMORY_H_