Return MaybeHandle from SetProperty.

src/liveedit.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 938 matching lines @@
           STATIC_ASCII_VECTOR("startPosition"));
       Handle<String> end_pos_key = factory->InternalizeOneByteString(
           STATIC_ASCII_VECTOR("endPosition"));
       Handle<String> script_obj_key = factory->InternalizeOneByteString(
           STATIC_ASCII_VECTOR("scriptObject"));
       Handle<Smi> start_pos(
           Smi::FromInt(message_location.start_pos()), isolate);
       Handle<Smi> end_pos(Smi::FromInt(message_location.end_pos()), isolate);
       Handle<JSValue> script_obj = GetScriptWrapper(message_location.script());
       JSReceiver::SetProperty(
-          rethrow_exception, start_pos_key, start_pos, NONE, SLOPPY);
+          rethrow_exception, start_pos_key, start_pos, NONE, SLOPPY).Assert();
       JSReceiver::SetProperty(
-          rethrow_exception, end_pos_key, end_pos, NONE, SLOPPY);
+          rethrow_exception, end_pos_key, end_pos, NONE, SLOPPY).Assert();
       JSReceiver::SetProperty(
-          rethrow_exception, script_obj_key, script_obj, NONE, SLOPPY);
+          rethrow_exception, script_obj_key, script_obj, NONE, SLOPPY).Assert();
     }
   }
 
   // A logical 'finally' section.
   isolate->set_active_function_info_listener(NULL);
   script->set_source(*original_source);
 
   if (rethrow_exception.is_null()) {
     return *(listener.GetResult());
   } else {
@@ skipping 1153 matching lines @@
 
 bool LiveEditFunctionTracker::IsActive(Isolate* isolate) {
   return false;
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 
 
 } }  // namespace v8::internal