Add ClassMirror.isAbstract to the API and VM implementation.

runtime/lib/mirrors_impl.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.
 
 // VM-specific implementation of the dart:mirrors library.
 
 import "dart:collection";
 
 final emptyList = new UnmodifiableListView([]);
 final emptyMap = new _UnmodifiableMapView({});
@@ skipping 419 matching lines @@
 
   static _computeFindInContext(reflectee, name)
       native 'ClosureMirror_find_in_context';
 }
 
 class _LocalClassMirror extends _LocalObjectMirror
     implements ClassMirror {
   final Type _reflectedType;
   Symbol _simpleName;
   DeclarationMirror _owner;
+  final bool isAbstract;
   final bool _isGeneric;
   final bool _isMixinAlias;
   final bool _isGenericDeclaration;
   Type _instantiator;
 
   _LocalClassMirror(reflectee,
                     reflectedType,
                     String simpleName,
                     this._owner,
+                    this.isAbstract,
                     this._isGeneric,
                     this._isMixinAlias,
                     this._isGenericDeclaration)
       : this._simpleName = _s(simpleName),
         this._reflectedType = reflectedType,
         this._instantiator = reflectedType,
         super(reflectee);
 
 
   bool get hasReflectedType => !_isGenericDeclaration;
@@ skipping 338 matching lines @@
   static _ClassMirror_type_variables(reflectee)
       native "ClassMirror_type_variables";
 
   static _computeTypeArguments(reflectee)
       native "ClassMirror_type_arguments";
 }
 
 class _LocalFunctionTypeMirror extends _LocalClassMirror
     implements FunctionTypeMirror {
   _LocalFunctionTypeMirror(reflectee, reflectedType)
-      : super(reflectee, reflectedType, null, null, false, false, false);
+      : super(reflectee, reflectedType, null, null, false, false, false, false);
 
   bool get _isAnonymousMixinApplication => false;
 
   // FunctionTypeMirrors have a simpleName generated from their signature.
   Symbol _simpleName = null;
   Symbol get simpleName {
     if (_simpleName == null) {
       _simpleName = _s(_makeSignatureString(returnType, parameters));
     }
     return _simpleName;
@@ skipping 668 matching lines @@
     if (typeMirror == null) {
       typeMirror = makeLocalTypeMirror(key);
       _instanitationCache[key] = typeMirror;
       if (typeMirror is ClassMirror && !typeMirror._isGeneric) {
         _declarationCache[key] = typeMirror;
       }
     }
     return typeMirror;
   }
 }