Move (uppercase) JS builtins from js builtins object to native context.

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 12a0780021c15ec855017389c9743957ad62078a..978aeee94a8c3ba922a619b697c00477887b4d11 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -990,10 +990,8 @@ Handle<Code> Pipeline::GenerateCode() {
   // TODO(mstarzinger): This is just a temporary hack to make TurboFan work,
   // the correct solution is to restore the context register after invoking
   // builtins from full-codegen.
-  for (int i = 0; i < Builtins::NumberOfJavaScriptBuiltins(); i++) {
-    Builtins::JavaScript id = static_cast<Builtins::JavaScript>(i);
-    Object* builtin = isolate()->js_builtins_object()->javascript_builtin(id);
-    if (*info()->closure() == builtin) return Handle<Code>::null();
+  if (Context::IsJSBuiltin(isolate()->native_context(), info()->closure())) {
+    return Handle<Code>::null();
   }
 
   ZonePool zone_pool;