Updating Angular version

third_party/pkg/angular/lib/core_dom/directive.dart

Index: third_party/pkg/angular/lib/core_dom/directive.dart
diff --git a/third_party/pkg/angular/lib/core_dom/directive.dart b/third_party/pkg/angular/lib/core_dom/directive.dart
index 6cf5ce829af15351a21d81f8c0ee80dc17178044..647f954eaf496907abb219bf997a8bcbf8d284d1 100644
--- a/third_party/pkg/angular/lib/core_dom/directive.dart
+++ b/third_party/pkg/angular/lib/core_dom/directive.dart
@@ -12,7 +12,6 @@ abstract class TextChangeListener{
   call(String text);
 }
 
-
 /**
  * NodeAttrs is a facade for element attributes. The facade is responsible
  * for normalizing attribute names as well as allowing access to the
@@ -25,17 +24,18 @@ class NodeAttrs {
 
   NodeAttrs(this.element);
 
-  operator [](String name) => element.attributes[_snakeCase(name, '-')];
+  operator [](String attributeName) =>
+      element.attributes[snakecase(attributeName, '-')];
 
-  operator []=(String name, String value) {
-    name = _snakeCase(name, '-');
+  operator []=(String attributeName, String value) {
+    var snakeName = snakecase(attributeName, '-');
     if (value == null) {
-      element.attributes.remove(name);
+      element.attributes.remove(snakeName);
     } else {
-      element.attributes[name] = value;
+      element.attributes[snakeName] = value;
     }
-    if (_observers != null && _observers.containsKey(name)) {
-      _observers[name].forEach((fn) => fn(value));
+    if (_observers != null && _observers.containsKey(attributeName)) {
+      _observers[attributeName].forEach((fn) => fn(value));
     }
   }
 
@@ -45,7 +45,6 @@ class NodeAttrs {
    * synchronise with the current value.
    */
   observe(String attributeName, AttributeChanged notifyFn) {
-    attributeName = _snakeCase(attributeName, '-');
     if (_observers == null) {
       _observers = new Map<String, List<AttributeChanged>>();
     }
@@ -55,6 +54,16 @@ class NodeAttrs {
     _observers[attributeName].add(notifyFn);
     notifyFn(this[attributeName]);
   }
+
+  void forEach(void f(String k, String v)) {
+    element.attributes.forEach((k, v) => f(camelcase(k), v));
+  }
+
+  bool containsKey(String attributeName) =>
+      element.attributes.containsKey(snakecase(attributeName, '-'));
+
+  Iterable<String> get keys =>
+      element.attributes.keys.map((name) => camelcase(name));
 }
 
 /**
@@ -69,11 +78,3 @@ class TemplateLoader {
 
   TemplateLoader(this._template);
 }
-
-var _SNAKE_CASE_REGEXP = new RegExp("[A-Z]");
-String _snakeCase(String name, [separator = '_']) {
-  _snakeReplace(Match match) =>
-    (match.start != 0 ? separator : '') + match.group(0).toLowerCase();
-
-  return name.replaceAllMapped(_SNAKE_CASE_REGEXP, _snakeReplace);
-}