Move Index and IndexStore implementations into Engine.

pkg/analyzer/test/reflective_tests.dart

 // Copyright (c) 2014, 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.
 
 library reflective.tests;
 
 import 'dart:async';
 
 @MirrorsUsed(metaTargets: 'ReflectiveTestCase')
 import 'dart:mirrors';
@@ skipping 79 matching lines @@
   _invokeSymbolIfExists(instanceMirror, #tearDown);
 }
 
 
 void _invokeSymbolIfExists(InstanceMirror instanceMirror, Symbol symbol) {
   try {
     instanceMirror.invoke(symbol, []);
   } on NoSuchMethodError catch (e) {
   }
 }