Format all files under tools and utils directory.

tools/dom/src/_HttpRequestUtils.dart

Index: tools/dom/src/_HttpRequestUtils.dart
diff --git a/tools/dom/src/_HttpRequestUtils.dart b/tools/dom/src/_HttpRequestUtils.dart
index 5ba04bf247e63fb35ba20e272565b4f4a7693f69..d6e73d76e7cf74dc1c52bf6049d29f3a9a302beb 100644
--- a/tools/dom/src/_HttpRequestUtils.dart
+++ b/tools/dom/src/_HttpRequestUtils.dart
@@ -5,11 +5,9 @@
 part of html;
 
 class _HttpRequestUtils {
-
   // Helper for factory HttpRequest.get
-  static HttpRequest get(String url,
-                            onComplete(HttpRequest request),
-                            bool withCredentials) {
+  static HttpRequest get(
+      String url, onComplete(HttpRequest request), bool withCredentials) {
     final request = new HttpRequest();
     request.open('GET', url, async: true);