Update the Angular/DI tests to latest from github.

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

Index: third_party/pkg/angular/lib/tools/html_extractor.dart
diff --git a/third_party/pkg/angular/lib/tools/html_extractor.dart b/third_party/pkg/angular/lib/tools/html_extractor.dart
index 175e74be62db8337bbde0e5d8f6f82a7f87849df..4dc637cb478eec4e0765932b4f30634e7597b4a7 100644
--- a/third_party/pkg/angular/lib/tools/html_extractor.dart
+++ b/third_party/pkg/angular/lib/tools/html_extractor.dart
@@ -14,27 +14,26 @@ RegExp _NG_REPEAT_SYNTAX = new RegExp(r'^\s*(.+)\s+in\s+(.*?)\s*(\s+track\s+by\s
 
 class HtmlExpressionExtractor {
   List<DirectiveInfo> directiveInfos;
-  IoService ioService;
 
-  HtmlExpressionExtractor(this.directiveInfos, this.ioService);
+  HtmlExpressionExtractor(this.directiveInfos) {
+    for (DirectiveInfo directiveInfo in directiveInfos) {
+      expressions.addAll(directiveInfo.expressions);
+      if (directiveInfo.template != null) {
+        parseHtml(directiveInfo.template);
+      }
+    }
+  }
 
   Set<String> expressions = new Set<String>();
 
-  void crawl(root) {
+  void crawl(String root, IoService ioService) {
     ioService.visitFs(root, (String file) {
       if (!file.endsWith('.html')) return;
-
-      _parseHtml(ioService.readAsStringSync(file));
+      parseHtml(ioService.readAsStringSync(file));
     });
-    for (DirectiveInfo directiveInfo in directiveInfos) {
-      expressions.addAll(directiveInfo.expressions);
-      if (directiveInfo.template != null) {
-        _parseHtml(directiveInfo.template);
-      }
-    }
   }
 
-  void _parseHtml(String html) {
+  void parseHtml(String html) {
     var document = parse(html);
     visitNodes([document], (Node node) {
       if (matchesNode(node, r'[*=/{{.*}}/]')) {