feat(core): support ngOnDestroy on providers of a directive.

Such providers also become eager as they will be instantiated
anyways on destruction.

modules/@angular/compiler/src/lifecycle_reflector.ts

@@ -0,0 +1,41 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {OnInit, OnDestroy, DoCheck, OnChanges, AfterContentInit, AfterContentChecked, AfterViewInit, AfterViewChecked,} from '@angular/core';
+import {reflector, LifecycleHooks} from '../core_private';
+
+import {Type} from './facade/lang';
+import {MapWrapper} from './facade/collection';
+
+const LIFECYCLE_INTERFACES: Map<any, Type> = MapWrapper.createFromPairs([
+  [LifecycleHooks.OnInit, OnInit],
+  [LifecycleHooks.OnDestroy, OnDestroy],
+  [LifecycleHooks.DoCheck, DoCheck],
+  [LifecycleHooks.OnChanges, OnChanges],
+  [LifecycleHooks.AfterContentInit, AfterContentInit],
+  [LifecycleHooks.AfterContentChecked, AfterContentChecked],
+  [LifecycleHooks.AfterViewInit, AfterViewInit],
+  [LifecycleHooks.AfterViewChecked, AfterViewChecked],
+]);
+
+const LIFECYCLE_PROPS: Map<any, string> = MapWrapper.createFromPairs([
+  [LifecycleHooks.OnInit, 'ngOnInit'],
+  [LifecycleHooks.OnDestroy, 'ngOnDestroy'],
+  [LifecycleHooks.DoCheck, 'ngDoCheck'],
+  [LifecycleHooks.OnChanges, 'ngOnChanges'],
+  [LifecycleHooks.AfterContentInit, 'ngAfterContentInit'],
+  [LifecycleHooks.AfterContentChecked, 'ngAfterContentChecked'],
+  [LifecycleHooks.AfterViewInit, 'ngAfterViewInit'],
+  [LifecycleHooks.AfterViewChecked, 'ngAfterViewChecked'],
+]);
+
+export function hasLifecycleHook(hook: LifecycleHooks, token: any): boolean {
+  var lcInterface = LIFECYCLE_INTERFACES.get(hook);
+  var lcProp = LIFECYCLE_PROPS.get(hook);
+  return reflector.hasLifecycleHook(token, lcInterface, lcProp);
+}