pkg/unittest: add @proxy to Mock

pkg/unittest/lib/mock.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.
 
 /**
  * A simple mocking/spy library.
  *
  * ## Installing ##
  *
  * Use [pub][] to install this package. Add the following to your `pubspec.yaml`
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  *[neverThrew] asserts that no matching call to a method threw
  * a value that matched [value].
  */
 Matcher neverThrew(value) =>
   new _ResultSetMatcher(Action.THROW, wrapMatcher(value), _Frequency.NONE);
 
 /** The shared log used for named mocks. */
 LogEntryList sharedLog = null;
 
 /** The base class for all mocked objects. */
+@proxy
 class Mock {
   /** The mock name. Needed if the log is shared; optional otherwise. */
   final String name;
 
   /** The set of [Behavior]s supported. */
   LinkedHashMap<String,Behavior> _behaviors;
 
   /** The [log] of calls made. Only used if [name] is null. */
   LogEntryList log;
 
@@ skipping 281 matching lines @@
       }
     }
   }
 
   /** Clear both logs and behavior. */
   void reset() {
     resetBehavior();
     clearLogs();
   }
 }