Encapsulate compare nil ic_state.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index df042a186424e8cb156074555fdfe3046b910c56..9ed60c2b4f87293d6089720fb4b7f37af3891465 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -9976,20 +9976,6 @@ void ObjectVisitor::VisitExternalReference(RelocInfo* rinfo) {
 }
 
 
-byte Code::compare_nil_state() {
-  ASSERT(is_compare_nil_ic_stub());
-  return CompareNilICStub::ExtractTypesFromExtraICState(
-      extended_extra_ic_state());
-}
-
-
-byte Code::compare_nil_value() {
-  ASSERT(is_compare_nil_ic_stub());
-  return CompareNilICStub::ExtractNilValueFromExtraICState(
-      extended_extra_ic_state());
-}
-
-
 void Code::InvalidateRelocation() {
   set_relocation_info(GetHeap()->empty_byte_array());
 }