refactor(compiler): don’t rely on global reflector (#16832)

Using the global reflector made it impossible
to compile multiple programs at the same time.

packages/compiler/src/compile_reflector.ts

@@ -0,0 +1,22 @@
+/**
+ * @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 {Component} from '@angular/core';
+import * as o from './output/output_ast';
+
+/**
+ * Provides access to reflection data about symbols that the compiler needs.
+ */
+export abstract class CompileReflector {
+  abstract parameters(typeOrFunc: /*Type*/ any): any[][];
+  abstract annotations(typeOrFunc: /*Type*/ any): any[];
+  abstract propMetadata(typeOrFunc: /*Type*/ any): {[key: string]: any[]};
+  abstract hasLifecycleHook(type: any, lcProperty: string): boolean;
+  abstract componentModuleUrl(type: /*Type*/ any, cmpMetadata: Component): string;
+  abstract resolveExternalReference(ref: o.ExternalReference): any;
+}