Preparation for moving reusable handles to thread and more cleanups: isolate -> thread based handle…

runtime/vm/isolate.cc

Index: runtime/vm/isolate.cc
diff --git a/runtime/vm/isolate.cc b/runtime/vm/isolate.cc
index 6089f2db721e057c24b9e4878c09bc754eedab5f..2fe73df867739bfa8c9fc6f35d8ace0cf0a1cfe0 100644
--- a/runtime/vm/isolate.cc
+++ b/runtime/vm/isolate.cc
@@ -887,7 +887,7 @@ Isolate* Isolate::Init(const char* name_prefix,
 
   result->BuildName(name_prefix);
   result->debugger_ = new Debugger();
-  result->debugger_->Initialize(result);
+  result->debugger_->Initialize(Thread::Current());
   if (FLAG_trace_isolates) {
     if (name_prefix == NULL || strcmp(name_prefix, "vm-isolate") != 0) {
       OS::Print("[+] Starting isolate:\n"