Updating Angular version

third_party/pkg/angular/lib/tools/source_crawler_impl.dart

 library angular.source_crawler_impl;
 
 import 'dart:io';
 import 'package:analyzer/analyzer.dart';
-import 'source_crawler.dart';
+import 'package:angular/tools/source_crawler.dart';
 
 const String PACKAGE_PREFIX = 'package:';
 
 /**
  * Dart source file crawler. As it crawls Dart source, it calls
  * [CompilationUnitVisitor] on each file.
  */
 class SourceCrawlerImpl implements SourceCrawler {
   final List<String> packageRoots;
 
@@ skipping 73 matching lines @@
   }
 
   String _packageUriResolver(String uri, String packageRoot) {
     var packagePath = uri.substring(PACKAGE_PREFIX.length);
     if (!packageRoot.endsWith('/')) {
       packageRoot = packageRoot + '/';
     }
     return packageRoot + packagePath;
   }
 }