Use UnmodifiableMapView in compiler

pkg/docgen/lib/src/models/class.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 docgen.models.clazz;
 
 import '../exports/dart2js_mirrors.dart' as dart2js_mirrors;
 import '../exports/mirrors_util.dart' as dart2js_util;
 import '../exports/source_mirrors.dart';
 
@@ skipping 68 matching lines @@
     // The reason we do this madness is the superclass and interface owners may
     // not be this class's owner!! Example: BaseClient in http pkg.
     var superinterfaces = classMirror.superinterfaces.map(
         (interface) => new Class._possiblyDifferentOwner(interface, owner));
     this._superclass = classMirror.superclass == null? null :
         new Class._possiblyDifferentOwner(classMirror.superclass, owner);
 
     interfaces = superinterfaces.toList();
     variables = createVariables(
         dart2js_util.variablesOf(classMirror.declarations), this);
-    methods = createMethods(classMirror.declarations.values.where(
-        (mirror) => mirror is MethodMirror), this);
+    methods = createMethods(dart2js_util.anyMethodOf(classMirror.declarations),
+        this);
 
     // Tell superclass that you are a subclass, unless you are not
     // visible or an intermediary mixin class.
     if (!classMirror.isNameSynthetic && isVisible && _superclass != null) {
       _superclass.addSubclass(this);
     }
 
     if (this._superclass != null) addInherited(_superclass);
     interfaces.forEach((interface) => addInherited(interface));
   }
@@ skipping 135 matching lines @@
     'methods': expandMethodMap(methods),
     'inheritedMethods': expandMethodMap(inheritedMethods),
     'annotations': annotations.map((a) => a.toMap()).toList(),
     'generics': recurseMap(generics)
   };
 
   int compareTo(Class other) => name.compareTo(other.name);
 
   bool isValidMirror(DeclarationMirror mirror) => mirror is ClassMirror;
 }