Update all Angular libs (run update_all.sh).

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 4dc637cb478eec4e0765932b4f30634e7597b4a7..ddeef0e075bfd38e624d342129d3ec05dc13326e 100644
--- a/third_party/pkg/angular/lib/tools/html_extractor.dart
+++ b/third_party/pkg/angular/lib/tools/html_extractor.dart
@@ -13,7 +13,7 @@ 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) {
@@ -44,7 +44,7 @@ class HtmlExpressionExtractor {
         });
       }
       if (matchesNode(node, r':contains(/{{.*}}/)')) {
-        _MUSTACHE_REGEXP.allMatches(node.value).forEach((match) {
+        _MUSTACHE_REGEXP.allMatches(node.text).forEach((match) {
           expressions.add(match.group(1));
         });
       }
@@ -55,7 +55,8 @@ class HtmlExpressionExtractor {
       }
 
       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]);
@@ -69,7 +70,7 @@ class HtmlExpressionExtractor {
   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);
       }
     }