Run dartfmt on all files under runtime.

runtime/observatory/tests/observatory_ui/source_link/element_test.dart

Index: runtime/observatory/tests/observatory_ui/source_link/element_test.dart
diff --git a/runtime/observatory/tests/observatory_ui/source_link/element_test.dart b/runtime/observatory/tests/observatory_ui/source_link/element_test.dart
index 38218f3322e33d0a12b02e3819cd907a30a6aa33..8a8efe9545c80707f4bd9e48b8cbba2421235ac7 100644
--- a/runtime/observatory/tests/observatory_ui/source_link/element_test.dart
+++ b/runtime/observatory/tests/observatory_ui/source_link/element_test.dart
@@ -13,10 +13,13 @@ main() {
   const isolate = const IsolateRefMock(id: 'isolate-id');
   const script_id = 'script-id';
   const file = 'filename.dart';
-  final script = new ScriptMock(id: script_id, uri: 'package/$file',
-      tokenToLine: (int token) => 1, tokenToCol: (int token) => 2);
-  final location = new SourceLocationMock(script: script, tokenPos: 0,
-      endTokenPos: 1);
+  final script = new ScriptMock(
+      id: script_id,
+      uri: 'package/$file',
+      tokenToLine: (int token) => 1,
+      tokenToCol: (int token) => 2);
+  final location =
+      new SourceLocationMock(script: script, tokenPos: 0, endTokenPos: 1);
   final repository = new ScriptRepositoryMock();
   test('instantiation', () {
     final e = new SourceLinkElement(isolate, location, repository);
@@ -27,24 +30,22 @@ main() {
   test('elements created after attachment', () async {
     bool rendered = false;
     final repository = new ScriptRepositoryMock(
-      getter: expectAsync((isolate, id) async {
-        expect(rendered, isFalse);
-        expect(id, equals(script_id));
-        return script;
-      }, count: 1)
-    );
+        getter: expectAsync((isolate, id) async {
+      expect(rendered, isFalse);
+      expect(id, equals(script_id));
+      return script;
+    }, count: 1));
     final e = new SourceLinkElement(isolate, location, repository);
     document.body.append(e);
     await e.onRendered.first;
     rendered = true;
     expect(e.children.length, isNonZero, reason: 'has elements');
     expect(e.innerHtml.contains(isolate.id), isTrue,
-      reason: 'no message in the component');
+        reason: 'no message in the component');
     expect(e.innerHtml.contains(file), isTrue,
-      reason: 'no message in the component');
+        reason: 'no message in the component');
     e.remove();
     await e.onRendered.first;
-    expect(e.children.length, isZero,
-      reason: 'is empty');
+    expect(e.children.length, isZero, reason: 'is empty');
   });
 }