feat(core): allow to add precompiled tokens via a provider

Introduces the new `ANALYZE_FOR_PRECOMPILE` token. This token can be used to
create a virtual provider that will populate the `precompile` fields of
components and app modules based on its
`useValue`. All components that are referenced in the `useValue`
value (either directly or in a nested array or map) will be added
to the `precompile` property.

closes #9874
related to #9726

modules/@angular/compiler-cli/integrationtest/test/precompile_spec.ts

@@ -7,14 +7,27 @@
  */
 
 import './init';
+
 import {BasicComp} from '../src/basic';
-import {CompWithPrecompile} from '../src/precompile';
+import {CompWithAnalyzePrecompileProvider, CompWithPrecompile} from '../src/precompile';
+
 import {createComponent} from './util';
 
 describe('content projection', () => {
-  it('should support basic content projection', () => {
+  it('should support precompile in components', () => {
     var compFixture = createComponent(CompWithPrecompile);
     var cf = compFixture.componentInstance.cfr.resolveComponentFactory(BasicComp);
     expect(cf.componentType).toBe(BasicComp);
   });
+
+  it('should support precompile via the ANALYZE_FOR_PRECOMPILE provider and function providers in components',
+     () => {
+       const compFixture = createComponent(CompWithAnalyzePrecompileProvider);
+       const cf = compFixture.componentInstance.cfr.resolveComponentFactory(BasicComp);
+       expect(cf.componentType).toBe(BasicComp);
+       // check that the function call that created the provider for ANALYZE_FOR_PRECOMPILE worked.
+       expect(compFixture.componentInstance.providedValue).toEqual([
+         {a: 'b', component: BasicComp}
+       ]);
+     });
 });