Move print to corelib.

runtime/lib/print_patch.dart

Index: runtime/lib/print_patch.dart
diff --git a/runtime/lib/print_patch.dart b/runtime/lib/print_patch.dart
new file mode 100644
index 0000000000000000000000000000000000000000..6d8c480b7fcc303b907dfc787ae65f4eaef83f77
--- /dev/null
+++ b/runtime/lib/print_patch.dart
@@ -0,0 +1,20 @@
+// 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 _unsupportedPrint(Object obj) {
+    throw const UnsupportedOperationException("'print' is not supported");
+  }
+
+  // _printClosure can be overwritten by the embedder to supply a different
+  // print implementation.
+  static _PrintClosure _printClosure = _unsupportedPrint;
+}