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

base/process_util_unittest_mac.mm

Index: base/process_util_unittest_mac.mm
===================================================================
--- base/process_util_unittest_mac.mm	(revision 41762)
+++ base/process_util_unittest_mac.mm	(working copy)
@@ -8,13 +8,10 @@
 
 @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