Minor cleanup of StoreBuffer related heap iteration methods.

src/heap.h

Index: src/heap.h
diff --git a/src/heap.h b/src/heap.h
index 77864cbe96cf3f4efcb9f8ff3c51fa075ad09519..ae6cc5b37459a01b72d9d456c049acc6f5818df0 100644
--- a/src/heap.h
+++ b/src/heap.h
@@ -228,11 +228,6 @@ class WeakObjectRetainer;
 typedef String* (*ExternalStringTableUpdaterCallback)(Heap* heap,
                                                       Object** pointer);
 
-typedef void (*PointerRegionCallback)(Heap* heap,
-                                      Address start,
-                                      Address end,
-                                      ObjectSlotCallback copy_object_func);
-
 class StoreBufferRebuilder {
  public:
   explicit StoreBufferRebuilder(StoreBuffer* store_buffer)
@@ -963,23 +958,6 @@ class Heap {
   // Iterates over all the other roots in the heap.
   void IterateWeakRoots(ObjectVisitor* v, VisitMode mode);
 
-  // For each region of pointers on a page in use from an old space call
-  // visit_pointer_region callback.
-  // If either visit_pointer_region or callback can cause an allocation
-  // in old space and changes in allocation watermark then
-  // can_preallocate_during_iteration should be set to true.
-  // All pages will be marked as having invalid watermark upon
-  // iteration completion.
-  void IteratePointers(
-      PagedSpace* space,
-      PointerRegionCallback visit_pointer_region,
-      ObjectSlotCallback callback);
-  static void IteratePointersOnPage(
-      PagedSpace* space,
-      PointerRegionCallback visit_pointer_region,
-      ObjectSlotCallback callback,
-      Page* page);
-
   // Iterate pointers to from semispace of new space found in memory interval
   // from start to end.
   void IterateAndMarkPointersToFromSpace(Address start,