fix(@ngtools/webpack): always process lazy routes

With support for the new API, we stopped processing lazy routes paths, which was a mistake

Author: hansl

packages/@ngtools/webpack/src/angular_compiler_plugin.ts

@@ -704,34 +704,27 @@ export class AngularCompilerPlugin implements Tapable {
 
     return Promise.resolve()
       .then(() => {
-        if (this._ngCompilerSupportsNewApi) {
-          return;
+        // Make a new program and load the Angular structure if there are changes.
+        if (changedFiles.length > 0) {
+          return this._createOrUpdateProgram();
         }
-
+      })
+      .then(() => {
         // Try to find lazy routes.
         // We need to run the `listLazyRoutes` the first time because it also navigates libraries
         // and other things that we might miss using the (faster) findLazyRoutesInAst.
         // Lazy routes modules will be read with compilerHost and added to the changed files.
         const changedTsFiles = this._compilerHost.getChangedFilePaths()
           .filter(k => k.endsWith('.ts'));
-        if (this._firstRun) {
+        if (this._ngCompilerSupportsNewApi) {
+          this._processLazyRoutes(this._listLazyRoutesFromProgram());
+          return this._createOrUpdateProgram();
+        } else if (this._firstRun) {
           this._processLazyRoutes(this._getLazyRoutesFromNgtools());
         } else if (changedTsFiles.length > 0) {
           this._processLazyRoutes(this._findLazyRoutesInAst(changedTsFiles));
         }
       })
-      .then(() => {
-        // Make a new program and load the Angular structure if there are changes.
-        if (changedFiles.length > 0) {
-          return this._createOrUpdateProgram();
-        }
-      })
-      .then(() => {
-        if (this._ngCompilerSupportsNewApi) {
-          // TODO: keep this when the new ngCompiler supports the new lazy routes API.
-          this._lazyRoutes = this._listLazyRoutesFromProgram();
-        }
-      })
       .then(() => {
         // Build transforms, emit and report errors if there are changes or it's the first run.
         if (changedFiles.length > 0 || this._firstRun) {