Make accessors for oddball objects return Oddball* instead of Object*.

src/isolate.cc

Index: src/isolate.cc
===================================================================
--- src/isolate.cc	(revision 9511)
+++ src/isolate.cc	(working copy)
@@ -98,6 +98,14 @@
   failed_access_check_callback_ = NULL;
   save_context_ = NULL;
   catcher_ = NULL;
+
+  // These members are re-initialized later after deserialization
+  // is complete.
+  pending_exception_ = NULL;
+  has_pending_message_ = false;
+  pending_message_obj_ = NULL;
+  pending_message_script_ = NULL;
+  scheduled_exception_ = NULL;
 }
 
 
@@ -1284,6 +1292,9 @@
   memcpy(to, reinterpret_cast<char*>(thread_local_top()),
          sizeof(ThreadLocalTop));
   InitializeThreadLocal();
+  clear_pending_exception();
+  clear_pending_message();
+  clear_scheduled_exception();
   return to + sizeof(ThreadLocalTop);
 }
 
@@ -1611,9 +1622,6 @@
 void Isolate::InitializeThreadLocal() {
   thread_local_top_.isolate_ = this;
   thread_local_top_.Initialize();
-  clear_pending_exception();
-  clear_pending_message();
-  clear_scheduled_exception();
 }
 
 
@@ -1771,6 +1779,11 @@
     stub_cache_->Initialize(true);
   }
 
+  // Finish initialization of ThreadLocal after deserialization is done.
+  clear_pending_exception();
+  clear_pending_message();
+  clear_scheduled_exception();
+
   // Deserializing may put strange things in the root array's copy of the
   // stack guard.
   heap_.SetStackLimits();