[heap] Cleanup: remove unused declaration

src/heap/store-buffer.h

 // Copyright 2011 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_STORE_BUFFER_H_
 #define V8_STORE_BUFFER_H_
 
 #include "src/allocation.h"
 #include "src/base/logging.h"
 #include "src/base/platform/platform.h"
 #include "src/globals.h"
 
 namespace v8 {
 namespace internal {
 
 class Page;
 class PagedSpace;
 class StoreBuffer;
 
 typedef void (*ObjectSlotCallback)(HeapObject** from, HeapObject* to);
 
-typedef void (StoreBuffer::*RegionCallback)(Address start, Address end,
-                                            ObjectSlotCallback slot_callback);
-
 // Used to implement the write barrier by collecting addresses of pointers
 // between spaces.
 class StoreBuffer {
  public:
   explicit StoreBuffer(Heap* heap);
 
   static void StoreBufferOverflow(Isolate* isolate);
 
   void SetUp();
   void TearDown();
@@ skipping 105 matching lines @@
 
   bool SpaceAvailable(intptr_t space_needed);
   void ExemptPopularPages(int prime_sample_step, int threshold);
 
   void ProcessOldToNewSlot(Address slot_address,
                            ObjectSlotCallback slot_callback);
 
   void FindPointersToNewSpaceInRegion(Address start, Address end,
                                       ObjectSlotCallback slot_callback);
 
-  // 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.
-  void IteratePointersOnPage(PagedSpace* space, Page* page,
-                             RegionCallback region_callback,
-                             ObjectSlotCallback slot_callback);
-
   void IteratePointersInStoreBuffer(ObjectSlotCallback slot_callback);
 
 #ifdef VERIFY_HEAP
   void VerifyPointers(LargeObjectSpace* space);
 #endif
 
   friend class DontMoveStoreBufferEntriesScope;
   friend class FindPointersToNewSpaceVisitor;
   friend class StoreBufferRebuildScope;
 };
@@ skipping 56 matching lines @@
   }
 
  private:
   StoreBuffer* store_buffer_;
   bool stored_state_;
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_STORE_BUFFER_H_