Revert of [heap] Give marking functions for incremental marking more precise names.

src/heap/heap.cc

Index: src/heap/heap.cc
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 1fd8f4d2a909aad96c01344d56995b1af464fe58..15b6a2357763a952fd17ce592d384998a09c01b2 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -4698,7 +4698,7 @@
     // promoted objects.
     if (heap_->incremental_marking()->black_allocation()) {
       Code* code = Code::cast(Code::GetObjectFromEntryAddress(code_entry_slot));
-      IncrementalMarking::MarkGrey(heap_, code);
+      IncrementalMarking::MarkObject(heap_, code);
     }
   }
 
@@ -4734,7 +4734,7 @@
   // regular visiting and IteratePromotedObjectPointers.
   if (!was_marked_black) {
     if (incremental_marking()->black_allocation()) {
-      IncrementalMarking::MarkGrey(this, target->map());
+      IncrementalMarking::MarkObject(this, target->map());
       incremental_marking()->IterateBlackObject(target);
     }
   }