Keyed IC cleanup: we always return Handle<Code>(), so just return void instead.

src/ic/ic.h

Index: src/ic/ic.h
diff --git a/src/ic/ic.h b/src/ic/ic.h
index 50350bc0a2bb638a7b27e3f0521639ca6d47928d..99695b5b347cb62cefbe17f73e440c1ff63d6483 100644
--- a/src/ic/ic.h
+++ b/src/ic/ic.h
@@ -369,7 +369,7 @@ class KeyedLoadIC : public LoadIC {
 
  protected:
   // receiver is HeapObject because it could be a String or a JSObject
-  Handle<Code> LoadElementStub(Handle<HeapObject> receiver);
+  void UpdateLoadElement(Handle<HeapObject> receiver);
 
  private:
   friend class IC;
@@ -478,8 +478,8 @@ class KeyedStoreIC : public StoreIC {
   static void Clear(Isolate* isolate, Code* host, KeyedStoreICNexus* nexus);
 
  protected:
-  Handle<Code> StoreElementStub(Handle<Map> receiver_map,
-                                KeyedAccessStoreMode store_mode);
+  void UpdateStoreElement(Handle<Map> receiver_map,
+                          KeyedAccessStoreMode store_mode);
 
  private:
   Handle<Map> ComputeTransitionedMap(Handle<Map> map,