Handlify upper layers of KeyedStoreIC.

src/ic.h

Index: src/ic.h
diff --git a/src/ic.h b/src/ic.h
index 6d5f321e6aaaf9740529752a36202650bfc0c02a..efef44a3b14f85a97fd74c48d06ac776407635b9 100644
--- a/src/ic.h
+++ b/src/ic.h
@@ -603,29 +603,24 @@ class KeyedStoreIC: public KeyedIC {
     return Isolate::Current()->builtins()->builtin(
         Builtins::kKeyedStoreIC_Initialize);
   }
-  Code* megamorphic_stub() {
-    return isolate()->builtins()->builtin(
-        Builtins::kKeyedStoreIC_Generic);
-  }
   static Code* initialize_stub_strict() {
     return Isolate::Current()->builtins()->builtin(
         Builtins::kKeyedStoreIC_Initialize_Strict);
   }
-  Code* megamorphic_stub_strict() {
-    return isolate()->builtins()->builtin(
-        Builtins::kKeyedStoreIC_Generic_Strict);
+  Handle<Code> megamorphic_stub() {
+    return isolate()->builtins()->KeyedStoreIC_Generic();
   }
-  Code* generic_stub() {
-    return isolate()->builtins()->builtin(
-        Builtins::kKeyedStoreIC_Generic);
+  Handle<Code> megamorphic_stub_strict() {
+    return isolate()->builtins()->KeyedStoreIC_Generic_Strict();
   }
-  Code* generic_stub_strict() {
-    return isolate()->builtins()->builtin(
-        Builtins::kKeyedStoreIC_Generic_Strict);
+  Handle<Code> generic_stub() {
+    return isolate()->builtins()->KeyedStoreIC_Generic();
   }
-  Code* non_strict_arguments_stub() {
-    return isolate()->builtins()->builtin(
-        Builtins::kKeyedStoreIC_NonStrictArguments);
+  Handle<Code> generic_stub_strict() {
+    return isolate()->builtins()->KeyedStoreIC_Generic_Strict();
+  }
+  Handle<Code> non_strict_arguments_stub() {
+    return isolate()->builtins()->KeyedStoreIC_NonStrictArguments();
   }
 
   static void Clear(Address address, Code* target);