Generate all runtime files from dart.

tool/input_sdk/private/js_primitives.dart

 // Copyright (c) 2013, 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.
 
 /// dart2js "primitives", that is, features that cannot be implemented without
 /// access to JavaScript features.
 library dart2js._js_primitives;
 
 import 'dart:_foreign_helper' show
     JS;
 
-// This import is here temporarily to cause utils.dart to be compiled.
-// TODO(ochafik): Remove this phony import once other Dart files actually depend
-// on utils.
-import 'dart:_utils';
-
 /**
  * This is the low-level method that is used to implement [print].  It is
  * possible to override this function from JavaScript by defining a function in
  * JavaScript called "dartPrint".
  *
  * Notice that it is also possible to intercept calls to [print] from within a
  * Dart program using zones. This means that there is no guarantee that a call
  * to print ends in this method.
  */
 void printString(String string) {
@@ skipping 19 matching lines @@
   if (JS('bool', r'typeof print == "function"')) {
     JS('void', r'print(#)', string);
     return;
   }
 
   // This is somewhat nasty, but we don't want to drag in a bunch of
   // dependencies to handle a situation that cannot happen. So we
   // avoid using Dart [:throw:] and Dart [toString].
   JS('void', 'throw "Unable to print message: " + String(#)', string);
 }