Update all Angular libs (run update_all.sh).

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

 library angular.html_parser;
 
 import 'package:html5lib/parser.dart';
 import 'package:html5lib/dom.dart';
 
 import 'package:angular/tools/selector.dart';
 import 'package:angular/tools/io.dart';
 import 'package:angular/tools/common.dart';
 
 typedef NodeVisitor(Node node);
 
 RegExp _MUSTACHE_REGEXP = new RegExp(r'{{([^}]*)}}');
 RegExp _NG_REPEAT_SYNTAX = new RegExp(r'^\s*(.+)\s+in\s+(.*?)\s*(\s+track\s+by\s+(.+)\s*)?$');
 
 class HtmlExpressionExtractor {
-  List<DirectiveInfo> directiveInfos;
+  Iterable<DirectiveInfo> directiveInfos;
 
   HtmlExpressionExtractor(this.directiveInfos) {
     for (DirectiveInfo directiveInfo in directiveInfos) {
       expressions.addAll(directiveInfo.expressions);
       if (directiveInfo.template != null) {
         parseHtml(directiveInfo.template);
       }
     }
   }
 
@@ skipping 10 matching lines @@
     var document = parse(html);
     visitNodes([document], (Node node) {
       if (matchesNode(node, r'[*=/{{.*}}/]')) {
         node.attributes.forEach((attrName, attrValue) {
           _MUSTACHE_REGEXP.allMatches(attrValue).forEach((match) {
             expressions.add(match.group(1));
           });
         });
       }
       if (matchesNode(node, r':contains(/{{.*}}/)')) {
-        _MUSTACHE_REGEXP.allMatches(node.value).forEach((match) {
+        _MUSTACHE_REGEXP.allMatches(node.text).forEach((match) {
           expressions.add(match.group(1));
         });
       }
       if (matchesNode(node, r'[ng-repeat]')) {
         var expr = _NG_REPEAT_SYNTAX.
             firstMatch(node.attributes['ng-repeat']).group(2);
         expressions.add(expr);
       }
 
       for (DirectiveInfo directiveInfo in directiveInfos) {
-        if (matchesNode(node, directiveInfo.selector)) {
+        if (directiveInfo.selector != null &&
+            matchesNode(node, directiveInfo.selector)) {
           directiveInfo.expressionAttrs.forEach((attr) {
             if (node.attributes[attr] != null && attr != 'ng-repeat') {
               expressions.add(node.attributes[attr]);
             }
           });
         }
       }
     });
   }
 
   visitNodes(List<Node> nodes, NodeVisitor visitor) {
     for (Node node in nodes) {
       visitor(node);
-      if (node.nodes.length > 0) {
+      if (node.nodes.isNotEmpty) {
         visitNodes(node.nodes, visitor);
       }
     }
   }
 }