Phantom references support internal fields

src/debug.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_DEBUG_H_
 #define V8_DEBUG_H_
 
 #include "src/allocation.h"
 #include "src/arguments.h"
 #include "src/assembler.h"
@@ skipping 429 matching lines @@
 
   // Check whether this frame is just about to return.
   bool IsBreakAtReturn(JavaScriptFrame* frame);
 
   // Support for LiveEdit
   void FramesHaveBeenDropped(StackFrame::Id new_break_frame_id,
                              LiveEdit::FrameDropMode mode,
                              Object** restarter_frame_function_pointer);
 
   // Passed to MakeWeak.
-  static void HandleWeakDebugInfo(
-      const v8::WeakCallbackData<v8::Value, void>& data);
+  static void HandlePhantomDebugInfo(const v8::PhantomCallbackData<void>& data);
 
   // Threading support.
   char* ArchiveDebug(char* to);
   char* RestoreDebug(char* from);
   static int ArchiveSpacePerThread();
   void FreeThreadResources() { }
 
   // Record function from which eval was called.
   static void RecordEvalCaller(Handle<Script> script);
 
@@ skipping 301 matching lines @@
   // several frames above.
   // There is no calling conventions here, because it never actually gets
   // called, it only gets returned to.
   static void GenerateFrameDropperLiveEdit(MacroAssembler* masm);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_DEBUG_H_