Die on an OOM situation in many more cases....

base/process_util_unittest_mac.mm

 // Copyright (c) 2010 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.
 
 #include "base/process_util_unittest_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 @interface PsychoticallyBigObjCObject : NSObject
 {
-#if __LP64__
-  // On 64 bits, Objective C objects have no size limit that I can find.
-  int tooBigToCount_[0xF000000000000000U / sizeof(int)];
-#else
-  // On 32 bits, Objective C objects must be < 2G in size.
+  // On 32 bits, the compiler limits Objective C objects to < 2G in size, and on
+  // 64 bits, the ObjC2 Runtime Reference says that sizeof(anInstance) is
+  // constrained to 32 bits. Keep it < 2G for simplicity.
   int justUnder2Gigs_[(2U * 1024 * 1024 * 1024 - 1) / sizeof(int)];
-#endif
 }
 
 @end
 
 @implementation PsychoticallyBigObjCObject
 
 @end
 
 
 namespace base {
 
 void* AllocateViaCFAllocatorSystemDefault(int32 size) {
   return CFAllocatorAllocate(kCFAllocatorSystemDefault, size, 0);
 }
 
 void* AllocateViaCFAllocatorMalloc(int32 size) {
   return CFAllocatorAllocate(kCFAllocatorMalloc, size, 0);
 }
 
 void* AllocateViaCFAllocatorMallocZone(int32 size) {
   return CFAllocatorAllocate(kCFAllocatorMallocZone, size, 0);
 }
 
 void* AllocatePsychoticallyBigObjCObject() {
   return [[PsychoticallyBigObjCObject alloc] init];
 }
 
 }  // namespace base