Using KeyedStoreIC_Generic_Strict must prevent polymorphic case.

TEST=Fewer deopts in existing tests.

Review URL: http://codereview.chromium.org/7282007

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@8467 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/type-info.cc

@@ -122,6 +122,7 @@ bool TypeFeedbackOracle::StoreIsMegamorphicWithTypeInfo(Expression* expr) {
     Builtins* builtins = Isolate::Current()->builtins();
     return code->is_keyed_store_stub() &&
         *code != builtins->builtin(Builtins::kKeyedStoreIC_Generic) &&
+        *code != builtins->builtin(Builtins::kKeyedStoreIC_Generic_Strict) &&
         code->ic_state() == MEGAMORPHIC;
   }
   return false;