Remove usage of dart:json.

pkg/intl/lib/src/lazy_locale_data.dart

Index: pkg/intl/lib/src/lazy_locale_data.dart
diff --git a/pkg/intl/lib/src/lazy_locale_data.dart b/pkg/intl/lib/src/lazy_locale_data.dart
index 90ff3a1053aec952d927f84ca51828fbacb53e4a..ecef1ab1c1a71ba89e7f273d9a40b996320c3c52 100644
--- a/pkg/intl/lib/src/lazy_locale_data.dart
+++ b/pkg/intl/lib/src/lazy_locale_data.dart
@@ -10,8 +10,8 @@
 
 library lazy_locale_data;
 import 'dart:async';
+import 'dart:convert';
 import 'intl_helpers.dart';
-import 'dart:json' as json;
 
 /**
  * This implements the very basic map-type operations which are used
@@ -108,6 +108,6 @@ class LazyLocaleData {
    * return another future that parses the JSON into a usable format.
    */
   Future jsonData(Future input) {
-    return input.then( (response) => json.parse(response));
+    return input.then( (response) => JSON.decode(response));
   }
 }