Remove unused GlobalHandles::IterateWeakRoots()

src/global-handles.h

Index: src/global-handles.h
diff --git a/src/global-handles.h b/src/global-handles.h
index 7808d16a03f6e930829671550c5a7bd56b2c7518..ff6664f8c2685d86979e710cfa2dc8702ff205b2 100644
--- a/src/global-handles.h
+++ b/src/global-handles.h
@@ -183,10 +183,6 @@ class GlobalHandles {
   // Iterates over all weak roots in heap.
   void IterateWeakRoots(ObjectVisitor* v);
 
-  // Iterates over weak roots that are bound to a given callback.
-  void IterateWeakRoots(WeakReferenceGuest f,

[Michael Starzinger, 2013/01/21 12:22:51]

AFAICT we can get rid of the WeakReferenceGuest type definition as well, nobody
seems to use it anymore.

-                        WeakReferenceCallback callback);
-
   // Find all weak handles satisfying the callback predicate, mark
   // them as pending.
   void IdentifyWeakHandles(WeakSlotCallback f);