Object::GetElements() and friends maybehandlification.

src/debug.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 3581 matching lines @@
   return v8::Utils::ToLocal(event_data_);
 }
 
 
 v8::Handle<v8::String> MessageImpl::GetJSON() const {
   v8::EscapableHandleScope scope(
       reinterpret_cast<v8::Isolate*>(event_data_->GetIsolate()));
 
   if (IsEvent()) {
     // Call toJSONProtocol on the debug event object.
-    Handle<Object> fun = GetProperty(event_data_, "toJSONProtocol");
+    Handle<Object> fun =
+        GetProperty(event_data_, "toJSONProtocol").ToHandleChecked();
     if (!fun->IsJSFunction()) {
       return v8::Handle<v8::String>();
     }
     bool caught_exception;
     Handle<Object> json = Execution::TryCall(Handle<JSFunction>::cast(fun),
                                              event_data_,
                                              0, NULL, &caught_exception);
     if (caught_exception || !json->IsString()) {
       return v8::Handle<v8::String>();
     }
@@ skipping 195 matching lines @@
     {
       Locker locker(reinterpret_cast<v8::Isolate*>(isolate_));
       isolate_->debugger()->CallMessageDispatchHandler();
     }
   }
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal