Update the Angular/DI tests to latest from github.

third_party/pkg/di/lib/module.dart

Index: third_party/pkg/di/lib/module.dart
diff --git a/third_party/pkg/di/lib/module.dart b/third_party/pkg/di/lib/module.dart
index bcc9677c54cb33bb03bea5e690f163b544625311..a36a80c8baecbfb0dc73a20ea92a07a5eb7d80d1 100644
--- a/third_party/pkg/di/lib/module.dart
+++ b/third_party/pkg/di/lib/module.dart
@@ -22,6 +22,7 @@ typedef dynamic CreationStrategy(
  */
 typedef bool Visibility(Injector requesting, Injector defining);
 
+typedef Object TypeFactory(factory(Type));
 
 /**
  * A collection of type bindings. Once the module is passed into the injector,
@@ -31,6 +32,26 @@ typedef bool Visibility(Injector requesting, Injector defining);
 class Module {
   final Map<Type, _Provider> _providers = <Type, _Provider>{};
   final List<Module> _childModules = <Module>[];
+  Map<Type, TypeFactory> _typeFactories = {};
+
+  Map<Type, TypeFactory> get typeFactories {
+    if (_childModules.isEmpty) {
+      return _typeFactories;
+    }
+    var tmp = new Map.from(_typeFactories);
+    _childModules.forEach((child) {
+      if (child.typeFactories != null) {
+        child.typeFactories.forEach((type, factory) {
+          tmp[type] = factory;
+        });
+      }
+    });
+    return tmp;
+  }
+
+  set typeFactories(Map<Type, TypeFactory> factories) {
+    _typeFactories = factories;
+  }
 
   Map<Type, _Provider> _providersCache;
 
@@ -39,7 +60,7 @@ class Module {
    * child (installed) modules.
    */
   Map<Type, _Provider> get _bindings {
-    if (_providersCache == null) {
+    if (_isDirty) {
       _providersCache = <Type, _Provider>{};
       _childModules.forEach((child) => _providersCache.addAll(child._bindings));
       _providersCache.addAll(_providers);
@@ -54,7 +75,7 @@ class Module {
    */
   void value(Type id, value,
       {CreationStrategy creation, Visibility visibility}) {
-    _providersCache = null;
+    _dirty();
     _providers[id] = new _ValueProvider(value, creation, visibility);
   }
 
@@ -67,7 +88,7 @@ class Module {
    */
   void type(Type id, {Type implementedBy, CreationStrategy creation,
       Visibility visibility}) {
-    _providersCache = null;
+    _dirty();
     _providers[id] = new _TypeProvider(
         implementedBy == null ? id : implementedBy, creation, visibility);
   }
@@ -80,7 +101,7 @@ class Module {
    */
   void factory(Type id, FactoryFn factoryFn,
       {CreationStrategy creation, Visibility visibility}) {
-    _providersCache = null;
+    _dirty();
     _providers[id] = new _FactoryProvider(factoryFn, creation, visibility);
   }
 
@@ -90,8 +111,15 @@ class Module {
    */
   void install(Module module) {
     _childModules.add(module);
+    _dirty();
+  }
+
+  _dirty() {
     _providersCache = null;
   }
+
+  bool get _isDirty =>
+      _providersCache == null || _childModules.any((m) => m._isDirty);
 }
 
 /** Deafault creation strategy is to instantiate on the defining injector. */