Un-deprecate some deprecated code and fix a couple of hints

pkg/analyzer/lib/src/generated/engine.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 analyzer.src.generated.engine;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 1272 matching lines @@
 
   /**
    * A predicate indicating whether analysis is to parse and analyze function
    * bodies.
    */
   AnalyzeFunctionBodiesPredicate _analyzeFunctionBodiesPredicate =
       _analyzeAllFunctionBodies;
 
   @override
   @deprecated
-  int cacheSize = DEFAULT_CACHE_SIZE;
+  int cacheSize = 64;
 
   @override
   bool dart2jsHint = false;
 
   @override
   bool enableAssertInitializer = false;
 
   @override
   bool enableAssertMessage = false;
 
@@ skipping 1411 matching lines @@
    */
   bool get wereSourcesAdded => _changeSet.addedSources.length > 0;
 
   /**
    * Return `true` if any sources were removed or deleted.
    */
   bool get wereSourcesRemoved =>
       _changeSet.removedSources.length > 0 ||
       _changeSet.removedContainers.length > 0;
 }