Simplify the builtin functions and get rid of unused code.

bin/dartutils.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "bin/dartutils.h"
 
 #include "bin/extensions.h"
 #include "bin/directory.h"
 #include "bin/file.h"
 #include "include/dart_api.h"
@@ skipping 394 matching lines @@
                                                Dart_Handle builtin_lib) {
   // Setup the corelib 'print' function.
   Dart_Handle print =
       Dart_Invoke(builtin_lib, Dart_NewString("_getPrintClosure"), 0, 0);
   Dart_Handle coreimpl = Dart_LookupLibrary(Dart_NewString("dart:coreimpl"));
   Dart_Handle print_impl =
       Dart_GetClass(coreimpl, Dart_NewString("PrintImplementation"));
   Dart_Handle result = Dart_SetField(print_impl,
                                      Dart_NewString("_printClosure"), print);
 
-  // Setup the IO library.
+  // Setup the 'timer' factory.
+  Dart_Handle url = Dart_NewString(kIsolateLibURL);
+  DART_CHECK_VALID(url);
+  Dart_Handle isolate_lib = Dart_LookupLibrary(url);
+  DART_CHECK_VALID(isolate_lib);
   Dart_Handle io_lib = Builtin::LoadAndCheckLibrary(Builtin::kIOLibrary);
-  Builtin::SetupIOLibrary(io_lib);
+  Dart_Handle timer_closure =
+      Dart_Invoke(io_lib, Dart_NewString("_getTimerFactoryClosure"), 0, NULL);
+  Dart_Handle args[1];
+  args[0] = timer_closure;
+  DART_CHECK_VALID(Dart_Invoke(isolate_lib,
+                               Dart_NewString("_setTimerFactoryClosure"),
+                               1, args));
 
   // Set up package root if specified.
   if (package_root != NULL) {
     result = Dart_NewString(package_root);
     if (!Dart_IsError(result)) {
       const int kNumArgs = 1;
       Dart_Handle dart_args[kNumArgs];
       dart_args[0] = result;
       return Dart_Invoke(builtin_lib,
                          Dart_NewString("_setPackageRoot"),
@@ skipping 232 matching lines @@
 
 CObject* CObject::NewOSError(OSError* os_error) {
   CObject* error_message =
       new CObjectString(CObject::NewString(os_error->message()));
   CObjectArray* result = new CObjectArray(CObject::NewArray(3));
   result->SetAt(0, new CObjectInt32(CObject::NewInt32(kOSError)));
   result->SetAt(1, new CObjectInt32(CObject::NewInt32(os_error->code())));
   result->SetAt(2, error_message);
   return result;
 }