Remove several JSFunction delegator functions.

src/runtime/runtime-scopes.cc

Index: src/runtime/runtime-scopes.cc
diff --git a/src/runtime/runtime-scopes.cc b/src/runtime/runtime-scopes.cc
index d85f21b4a1c8d8300fd125c64876cbb10cd0aa4e..ecbe5cd17d953a7a13c667674425704100ce2e68 100644
--- a/src/runtime/runtime-scopes.cc
+++ b/src/runtime/runtime-scopes.cc
@@ -415,7 +415,7 @@ template <typename T>
 Handle<JSObject> NewSloppyArguments(Isolate* isolate, Handle<JSFunction> callee,
                                     T parameters, int argument_count) {
   CHECK(!IsSubclassConstructor(callee->shared()->kind()));
-  DCHECK(callee->has_simple_parameters());
+  DCHECK(callee->shared()->has_simple_parameters());
   Handle<JSObject> result =
       isolate->factory()->NewArgumentsObject(callee, argument_count);
 
@@ -673,8 +673,8 @@ RUNTIME_FUNCTION(Runtime_NewScriptContext) {
   // Script contexts have a canonical empty function as their closure, not the
   // anonymous closure containing the global code.  See
   // FullCodeGenerator::PushFunctionArgumentForContextAllocation.
-  Handle<JSFunction> closure(function->IsBuiltin() ? *function
-                                                   : native_context->closure());
+  Handle<JSFunction> closure(
+      function->shared()->IsBuiltin() ? *function : native_context->closure());
   Handle<Context> result =
       isolate->factory()->NewScriptContext(closure, scope_info);