[heap] Use callbacks to dispatch store buffer operations.

src/heap/store-buffer.cc

Index: src/heap/store-buffer.cc
diff --git a/src/heap/store-buffer.cc b/src/heap/store-buffer.cc
index abf6da409e1906cb5b95ef902678b5ffdcf27611..2e5f720c9f78f4c312f56736b0e6e30ab6a56c64 100644
--- a/src/heap/store-buffer.cc
+++ b/src/heap/store-buffer.cc
@@ -23,6 +23,8 @@ StoreBuffer::StoreBuffer(Heap* heap)
     lazy_top_[i] = nullptr;
   }
   task_running_ = false;
+  insertion_callback = &InsertDuringRuntime;
+  deletion_callback = &DeleteDuringRuntime;
 }
 
 void StoreBuffer::SetUp() {
@@ -137,29 +139,5 @@ void StoreBuffer::ConcurrentlyProcessStoreBuffer() {
   task_running_ = false;
 }
 
-void StoreBuffer::DeleteEntry(Address start, Address end) {
-  // Deletions coming from the GC are directly deleted from the remembered
-  // set. Deletions coming from the runtime are added to the store buffer
-  // to allow concurrent processing.
-  if (heap_->gc_state() == Heap::NOT_IN_GC) {
-    if (top_ + sizeof(Address) * 2 > limit_[current_]) {
-      StoreBufferOverflow(heap_->isolate());
-    }
-    *top_ = MarkDeletionAddress(start);
-    top_++;
-    *top_ = end;
-    top_++;
-  } else {
-    // In GC the store buffer has to be empty at any time.
-    DCHECK(Empty());
-    Page* page = Page::FromAddress(start);
-    if (end) {
-      RememberedSet<OLD_TO_NEW>::RemoveRange(page, start, end,
-                                             SlotSet::PREFREE_EMPTY_BUCKETS);
-    } else {
-      RememberedSet<OLD_TO_NEW>::Remove(page, start);
-    }
-  }
-}
 }  // namespace internal
 }  // namespace v8