first step to remove unsafe handles

src/d8.h

 // 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 274 matching lines @@
                                       Handle<String> full);
   static int* LookupCounter(const char* name);
   static void* CreateHistogram(const char* name,
                                int min,
                                int max,
                                size_t buckets);
   static void AddHistogramSample(void* histogram, int sample);
   static void MapCounters(const char* name);
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
-  static Handle<Object> DebugMessageDetails(Handle<String> message);
-  static Handle<Value> DebugCommandToJSONRequest(Handle<String> command);
+  static Handle<Object> DebugMessageDetails(Isolate* isolate,
+                                            Handle<String> message);
+  static Handle<Value> DebugCommandToJSONRequest(Isolate* isolate,
+                                                 Handle<String> command);
   static void DispatchDebugMessages();
 #endif  // ENABLE_DEBUGGER_SUPPORT
 #endif  // V8_SHARED
 
   static Handle<Value> RealmCurrent(const Arguments& args);
   static Handle<Value> RealmOwner(const Arguments& args);
   static Handle<Value> RealmGlobal(const Arguments& args);
   static Handle<Value> RealmCreate(const Arguments& args);
   static Handle<Value> RealmDispose(const Arguments& args);
   static Handle<Value> RealmSwitch(const Arguments& args);
@@ skipping 109 matching lines @@
   static void ExternalArrayWeakCallback(Isolate* isolate,
                                         Persistent<Value> object,
                                         void* data);
 };
 
 
 }  // namespace v8
 
 
 #endif  // V8_D8_H_