Reland of Remove slots that point to unboxed doubles from the StoreBuffer/SlotsBuffer.

src/heap/store-buffer.h

Index: src/heap/store-buffer.h
diff --git a/src/heap/store-buffer.h b/src/heap/store-buffer.h
index c9d6090927effaa6879e8cd34448587d864b05f4..c0df4039a589de8112ef4d4ff23995ee7f2005e2 100644
--- a/src/heap/store-buffer.h
+++ b/src/heap/store-buffer.h
@@ -107,6 +107,10 @@ class StoreBuffer {
   void ClearInvalidStoreBufferEntries();
   void VerifyValidStoreBufferEntries();
 
+  // Removes all the slots in [start_address, end_address) range from the store
+  // buffer.
+  void RemoveSlots(Address start_address, Address end_address);
+
  private:
   Heap* heap_;