Update the Angular/DI tests to latest from github.

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

Index: third_party/pkg/angular/lib/directive/ng_src_boolean.dart
diff --git a/third_party/pkg/angular/lib/directive/ng_src_boolean.dart b/third_party/pkg/angular/lib/directive/ng_src_boolean.dart
index 5511c91d955813453dd17d19571787627a6d8492..f2d57ead6a303c3381561ec1a615fd734ae5128e 100644
--- a/third_party/pkg/angular/lib/directive/ng_src_boolean.dart
+++ b/third_party/pkg/angular/lib/directive/ng_src_boolean.dart
@@ -30,7 +30,7 @@ part of angular.directive;
 @NgDirective(selector: '[ng-required]', map: const {'ng-required': '=>required'})
 @NgDirective(selector: '[ng-selected]', map: const {'ng-selected': '=>selected'})
 class NgBooleanAttributeDirective {
-  NodeAttrs attrs;
+  final NodeAttrs attrs;
   NgBooleanAttributeDirective(this.attrs);
 
   _setBooleanAttribute(name, value) => attrs[name] = (toBool(value) ? '' : null);
@@ -65,7 +65,7 @@ class NgBooleanAttributeDirective {
 @NgDirective(selector: '[ng-src]',    map: const {'ng-src':    '@src'})
 @NgDirective(selector: '[ng-srcset]', map: const {'ng-srcset': '@srcset'})
 class NgSourceDirective {
-  NodeAttrs attrs;
+  final NodeAttrs attrs;
   NgSourceDirective(this.attrs);
 
   set href(value)   => attrs['href']   = value;
@@ -75,29 +75,31 @@ class NgSourceDirective {
 }
 
 /**
- * In SVG some attributes have a specific syntax. Placing `{{interpolation}}` in those
- * attributes will break the attribute syntax, and browser will clear the attribute.
+ * In SVG some attributes have a specific syntax. Placing `{{interpolation}}` in
+ * those attributes will break the attribute syntax, and browser will clear the
+ * attribute.
  *
- * The `ng-attr-*` is a generic way to use interpolation without breaking the attribute
- * syntax validator. The `ng-attr-` part get stripped.
+ * The `ng-attr-*` is a generic way to use interpolation without breaking the
+ * attribute syntax validator. The `ng-attr-` part get stripped.
  *
  * @example
-       <svg>
-         <circle ng-attr-cx="{{cx}}"></circle>
-       </svg>
+ *     <svg>
+ *       <circle ng-attr-cx="{{cx}}"></circle>
+ *     </svg>
  */
 @NgDirective(selector: '[ng-attr-*]')
 class NgAttributeDirective implements NgAttachAware {
-  NodeAttrs _attrs;
+  final NodeAttrs _attrs;
 
-  NgAttributeDirective(NodeAttrs this._attrs);
+  NgAttributeDirective(this._attrs);
 
   void attach() {
+    String ngAttrPrefix = 'ng-attr-';
     _attrs.forEach((key, value) {
-      if (key.startsWith('ngAttr')) {
-        String newKey = snakecase(key.substring(6));
+      if (key.startsWith(ngAttrPrefix)) {
+        var newKey = key.substring(ngAttrPrefix.length);
         _attrs[newKey] = value;
-        _attrs.observe(snakecase(key), (newValue) => _attrs[newKey] = newValue );
+        _attrs.observe(key, (newValue) => _attrs[newKey] = newValue );
       }
     });
   }