Make Failure inherit from MaybeObject instead of Object.

src/ia32/assembler-ia32.cc

Index: src/ia32/assembler-ia32.cc
===================================================================
--- src/ia32/assembler-ia32.cc	(revision 5696)
+++ src/ia32/assembler-ia32.cc	(working copy)
@@ -120,10 +120,15 @@
 
   CodeDesc desc;
   assm.GetCode(&desc);
-  Object* code = Heap::CreateCode(desc,
-                                  Code::ComputeFlags(Code::STUB),
-                                  Handle<Code>::null());
+
+  Object* code;
+  { MaybeObject* maybe_code = Heap::CreateCode(desc,
+                                               Code::ComputeFlags(Code::STUB),
+                                               Handle<Code>::null());
+    if (!maybe_code->ToObject(&code)) return;
+  }
   if (!code->IsCode()) return;
+
   PROFILE(CodeCreateEvent(Logger::BUILTIN_TAG,
                           Code::cast(code), "CpuFeatures::Probe"));
   typedef uint64_t (*F0)();