Return MaybeHandle from GetProperty.

src/api.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 3525 matching lines @@
                                         i::LookupResult* lookup) {
   if (!lookup->IsProperty()) {
     // No real property was found.
     return Local<Value>();
   }
 
   // If the property being looked up is a callback, it can throw
   // an exception.
   EXCEPTION_PREAMBLE(isolate);
   PropertyAttributes ignored;
-  i::Handle<i::Object> result =
-      i::Object::GetProperty(receiver, receiver, lookup, name,
-                             &ignored);
-  has_pending_exception = result.is_null();
+  i::Handle<i::Object> result;
+  has_pending_exception = !i::Object::GetProperty(
+      receiver, receiver, lookup, name, &ignored).ToHandle(&result);
   EXCEPTION_BAILOUT_CHECK(isolate, Local<Value>());
 
   return Utils::ToLocal(result);
 }
 
 
 Local<Value> v8::Object::GetRealNamedPropertyInPrototypeChain(
     Handle<String> key) {
   i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
   ON_BAILOUT(isolate,
@@ skipping 4098 matching lines @@
   Isolate* isolate = reinterpret_cast<Isolate*>(info.GetIsolate());
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 } }  // namespace v8::internal