Update all Angular libs (run update_all.sh).

third_party/pkg/angular/lib/formatter/json.dart

-part of angular.filter;
+part of angular.formatter_internal;
 
 /**
- * Allows you to convert a JavaScript object into JSON string. This filter is
+ * Allows you to convert a JavaScript object into JSON string. This formatter is
  * mostly useful for debugging.
  *
  * Usage:
  *
  *     {{ json_expression | json }}
  */
-@NgFilter(name:'json')
-class JsonFilter {
-  call(text) => JSON.encode(text);
+@Formatter(name:'json')
+class Json implements Function {
+  String call(jsonObj) => JSON.encode(jsonObj);
 }