Handlify Object::GetPrototype and (most) callers.

src/isolate.cc

 // Copyright 2012 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 1015 matching lines @@
 
 bool Isolate::IsErrorObject(Handle<Object> obj) {
   if (!obj->IsJSObject()) return false;
 
   Handle<String> error_key =
       factory()->InternalizeOneByteString(STATIC_ASCII_VECTOR("$Error"));
   Handle<Object> error_constructor = Object::GetProperty(
       js_builtins_object(), error_key).ToHandleChecked();
 
   DisallowHeapAllocation no_gc;
-  for (Object* prototype = *obj; !prototype->IsNull();
-       prototype = prototype->GetPrototype(this)) {
+  for (Handle<Object> prototype = obj; !prototype->IsNull();
+       prototype = Object::GetPrototype(this, prototype)) {

[Yang, 2014/04/15 13:10:48]

The DisallowHeapAllocation scope should already make sure that this is safe
without being handlified.

     if (!prototype->IsJSObject()) return false;
-    if (JSObject::cast(prototype)->map()->constructor() ==
+    if (JSObject::cast(*prototype)->map()->constructor() ==
         *error_constructor) {
       return true;
     }
   }
   return false;
 }
 
 static int fatal_exception_depth = 0;
 
 void Isolate::DoThrow(Object* exception, MessageLocation* location) {
@@ skipping 1216 matching lines @@
       Handle<JSObject> obj = factory()->NewJSObjectFromMap(map);
       JSObject::NormalizeProperties(obj, KEEP_INOBJECT_PROPERTIES, 8);
       JSObject::SetProperty(registry, name, obj, NONE, STRICT).Assert();
     }
   }
   return Handle<JSObject>::cast(factory()->symbol_registry());
 }
 
 
 } }  // namespace v8::internal