Added a version of the v8::HandleScope constructor with an Isolate and use that consistently.

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 3549 matching lines @@
   return v8::Utils::ToLocal(exec_state_);
 }
 
 
 v8::Handle<v8::Object> MessageImpl::GetEventData() const {
   return v8::Utils::ToLocal(event_data_);
 }
 
 
 v8::Handle<v8::String> MessageImpl::GetJSON() const {
-  v8::HandleScope scope;
+  v8::HandleScope scope(
+      reinterpret_cast<v8::Isolate*>(event_data_->GetIsolate()));
 
   if (IsEvent()) {
     // Call toJSONProtocol on the debug event object.
     Handle<Object> fun = GetProperty(event_data_, "toJSONProtocol");
     if (!fun->IsJSFunction()) {
       return v8::Handle<v8::String>();
     }
     bool caught_exception;
     Handle<Object> json = Execution::TryCall(Handle<JSFunction>::cast(fun),
                                              event_data_,
@@ skipping 213 matching lines @@
     {
       Locker locker(reinterpret_cast<v8::Isolate*>(isolate));
       isolate->debugger()->CallMessageDispatchHandler();
     }
   }
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal