Patch print directly in corelib instead of going through coreimpl.

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());
-  }
+patch void print(Object obj) {
+  _printClosure(obj.toString());
+}
 
-  static void _unsupportedPrint(Object obj) {
-    throw const UnsupportedOperationException("'print' is not supported");
-  }
+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;
-}
+// _printClosure can be overwritten by the embedder to supply a different
+// print implementation.
+_PrintClosure _printClosure = _unsupportedPrint;