Added back declarations_model_easier.dart to lib and lib_strong mirrors tests to fix buildbot failu…

tests/lib_strong/mirrors/declarations_model_easier.dart

+// Copyright (c) 2013, 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 test.declarations_model;
+
+var libraryVariable;
+get libraryGetter => null;
+set librarySetter(x) => x;
+libraryMethod() => null;
+
+typedef bool Predicate(dynamic);
+
+abstract class Interface<I> {
+  operator /(x) => null;
+
+  var interfaceInstanceVariable;
+  get interfaceInstanceGetter;
+  set interfaceInstanceSetter(x);
+  interfaceInstanceMethod();
+
+  static var interfaceStaticVariable;
+  static get interfaceStaticGetter => null;
+  static set interfaceStaticSetter(x) => x;
+  static interfaceStaticMethod() => null;
+}
+
+class Superclass<S> {
+  operator -(x) => null;
+
+  var inheritedInstanceVariable;
+  get inheritedInstanceGetter => null;
+  set inheritedInstanceSetter(x) => x;
+  inheritedInstanceMethod() => null;
+
+  static var inheritedStaticVariable;
+  static get inheritedStaticGetter => null;
+  static set inheritedStaticSetter(x) => x;
+  static inheritedStaticMethod() => null;
+
+  Superclass.inheritedGenerativeConstructor(this.inheritedInstanceVariable);
+  Superclass.inheritedRedirectingConstructor(x)
+      : this.inheritedGenerativeConstructor(x * 2);
+  factory Superclass.inheritedNormalFactory(y) =>
+      new Superclass.inheritedRedirectingConstructor(y * 3);
+  factory Superclass.inheritedRedirectingFactory(z) =
+      Superclass.inheritedNormalFactory;
+}
+
+abstract class Class<C> extends Superclass<C> implements Interface<C> {
+  operator +(x) => null;
+
+  abstractMethod();
+
+  var instanceVariable;
+  get instanceGetter => null;
+  set instanceSetter(x) => x;
+  instanceMethod() => null;
+
+  static var staticVariable;
+  static get staticGetter => null;
+  static set staticSetter(x) => x;
+  static staticMethod() => null;
+
+  Class.generativeConstructor(this.instanceVariable)
+      : super.inheritedGenerativeConstructor(0);
+  Class.redirectingConstructor(x) : this.generativeConstructor(x * 2);
+  factory Class.normalFactory(y) => new ConcreteClass(y * 3);
+  factory Class.redirectingFactory(z) = Class.normalFactory;
+}
+
+// This is just here as a target of Class's factories to appease the analyzer.
+class ConcreteClass<CC> extends Class<CC> {
+  abstractMethod() {}
+
+  operator /(x) => null;
+
+  var interfaceInstanceVariable;
+  get interfaceInstanceGetter => null;
+  set interfaceInstanceSetter(x) => null;
+  interfaceInstanceMethod() => null;
+
+  ConcreteClass(x) : super.generativeConstructor(x);
+}