Move print to corelib.

runtime/lib/print_patch.dart

+// 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.
+
+
+typedef void _PrintClosure(Object obj);
+
+patch class PrintImplementation {
+  /* patch */ static void print(Object obj) {
+    _printClosure(obj.toString());
+  }
+
+  static void _print(Object obj) native "PrintImplementation_printString";

[Ivan Posva, 2012/08/30 00:32:13]

This closure belongs into the builtin library.

[Mads Ager (google), 2012/08/30 06:59:17]

Got it. I can move it back to builtin and do the patching through the API from
there.

+
+  // _printClosure can be overwritten by the embedder to supply a different
+  // print implementation.
+  static _PrintClosure _printClosure = _print;

[Ivan Posva, 2012/08/30 00:32:13]

And we should initialize the _printClosure with something like this:
static void _unsupported(Object obj) { throw new UnsupportedException(); }

[Mads Ager (google), 2012/08/30 06:59:17]

We can do that. I actually liked the fact that embedders got print wired up to
stdout out of the box and could overwrite it. But I do understand your point
that the VM library should not write to stdout.

+}