Patch print directly in corelib instead of going through coreimpl.

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
index 6d8c480b7fcc303b907dfc787ae65f4eaef83f77..6ae59f13c2f13be36217d5795e35a1016ef70234 100644
--- a/runtime/lib/print_patch.dart
+++ b/runtime/lib/print_patch.dart
@@ -2,19 +2,16 @@
 // 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");
-  }
+patch void print(Object obj) {
+  _printClosure(obj.toString());
+}
 
-  // _printClosure can be overwritten by the embedder to supply a different
-  // print implementation.
-  static _PrintClosure _printClosure = _unsupportedPrint;
+void _unsupportedPrint(Object obj) {
+  throw const UnsupportedOperationException("'print' is not supported");
 }
+
+// _printClosure can be overwritten by the embedder to supply a different
+// print implementation.
+_PrintClosure _printClosure = _unsupportedPrint;