Use a dictionary-mode code cache on the map rather than a dual system.

src/ic/arm/stub-cache-arm.cc

Index: src/ic/arm/stub-cache-arm.cc
diff --git a/src/ic/arm/stub-cache-arm.cc b/src/ic/arm/stub-cache-arm.cc
index 86710eb29a8f83240fe5292f2d0ed384a18b7887..8f8ee8e8a7396704640832c65e29f172a4a73ddc 100644
--- a/src/ic/arm/stub-cache-arm.cc
+++ b/src/ic/arm/stub-cache-arm.cc
@@ -103,9 +103,6 @@ void StubCache::GenerateProbe(MacroAssembler* masm, Code::Kind ic_kind,
   // entry size being 12.
   DCHECK(sizeof(Entry) == 12);
 
-  // Make sure the flags does not name a specific type.
-  DCHECK(Code::ExtractTypeFromFlags(flags) == 0);
-
   // Make sure that there are no register conflicts.
   DCHECK(!AreAliased(receiver, name, scratch, extra, extra2, extra3));