Introduce exception object and remove some uses of MaybeObject::IsFailure().

src/allocation-site-scopes.cc

 // Copyright 2013 the V8 project authors. 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 44 matching lines @@
     update_current_site(*scope_site);
   }
   ASSERT(!scope_site.is_null());
   return scope_site;
 }
 
 
 void AllocationSiteCreationContext::ExitScope(
     Handle<AllocationSite> scope_site,
     Handle<JSObject> object) {
-  if (!object.is_null() && !object->IsFailure()) {
+  if (!object.is_null()) {
     bool top_level = !scope_site.is_null() &&
         top().is_identical_to(scope_site);
 
     scope_site->set_transition_info(*object);
     if (FLAG_trace_creation_allocation_sites) {
       if (top_level) {
         PrintF("*** Setting AllocationSite %p transition_info %p\n",
                static_cast<void*>(*scope_site),
                static_cast<void*>(*object));
       } else {
@@ skipping 17 matching lines @@
                object->IsJSArray() ? "JSArray" : "JSObject",
                static_cast<void*>(*object));
       }
       return true;
     }
   }
   return false;
 }
 
 } }  // namespace v8::internal