Run dartfmt on all files under runtime.

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

Index: runtime/observatory/tests/observatory_ui/sample_buffer_control/element_test.dart
diff --git a/runtime/observatory/tests/observatory_ui/sample_buffer_control/element_test.dart b/runtime/observatory/tests/observatory_ui/sample_buffer_control/element_test.dart
index aa82df1a8c7c75a8a127759b9561fb4bc0953fc5..2cfebceda7e934d354d92a5445e2bdbe7a9d38b7 100644
--- a/runtime/observatory/tests/observatory_ui/sample_buffer_control/element_test.dart
+++ b/runtime/observatory/tests/observatory_ui/sample_buffer_control/element_test.dart
@@ -66,8 +66,7 @@ main() {
       expect(e.children.length, isNonZero, reason: 'has elements');
       e.remove();
       await e.onRendered.first;
-      expect(e.children.length, isZero,
-        reason: 'is empty');
+      expect(e.children.length, isZero, reason: 'is empty');
     });
     test('listen for status changes', () async {
       final e = new SampleBufferControlElement(progress, events.stream);
@@ -87,22 +86,19 @@ main() {
       await e.onRendered.first;
       expect(e.querySelector('select'), isNull);
       events.add(new SampleProfileLoadingProgressEventMock(
-        progress: new SampleProfileLoadingProgressMock(
-          status: M.SampleProfileLoadingStatus.fetching
-      )));
+          progress: new SampleProfileLoadingProgressMock(
+              status: M.SampleProfileLoadingStatus.fetching)));
       await e.onRendered.first;
       expect(e.querySelector('select'), isNull);
       events.add(new SampleProfileLoadingProgressEventMock(
-        progress: new SampleProfileLoadingProgressMock(
-          status: M.SampleProfileLoadingStatus.loading
-      )));
+          progress: new SampleProfileLoadingProgressMock(
+              status: M.SampleProfileLoadingStatus.loading)));
       await e.onRendered.first;
       expect(e.querySelector('select'), isNull);
       events.add(new SampleProfileLoadingProgressEventMock(
-        progress: new SampleProfileLoadingProgressMock(
-          status: M.SampleProfileLoadingStatus.loaded,
-          profile: new SampleProfileMock()
-      )));
+          progress: new SampleProfileLoadingProgressMock(
+              status: M.SampleProfileLoadingStatus.loaded,
+              profile: new SampleProfileMock())));
       events.close();
       await e.onRendered.first;
       expect(e.querySelector('select'), isNotNull);
@@ -111,27 +107,24 @@ main() {
     });
     test('follow updates changes (no tag)', () async {
       final e = new SampleBufferControlElement(progress, events.stream,
-        showTag: false);
+          showTag: false);
       document.body.append(e);
       await e.onRendered.first;
       expect(e.querySelector('select'), isNull);
       events.add(new SampleProfileLoadingProgressEventMock(
-        progress: new SampleProfileLoadingProgressMock(
-          status: M.SampleProfileLoadingStatus.fetching
-      )));
+          progress: new SampleProfileLoadingProgressMock(
+              status: M.SampleProfileLoadingStatus.fetching)));
       await e.onRendered.first;
       expect(e.querySelector('select'), isNull);
       events.add(new SampleProfileLoadingProgressEventMock(
-        progress: new SampleProfileLoadingProgressMock(
-          status: M.SampleProfileLoadingStatus.loading
-      )));
+          progress: new SampleProfileLoadingProgressMock(
+              status: M.SampleProfileLoadingStatus.loading)));
       await e.onRendered.first;
       expect(e.querySelector('select'), isNull);
       events.add(new SampleProfileLoadingProgressEventMock(
-        progress: new SampleProfileLoadingProgressMock(
-          status: M.SampleProfileLoadingStatus.loaded,
-          profile: new SampleProfileMock()
-      )));
+          progress: new SampleProfileLoadingProgressMock(
+              status: M.SampleProfileLoadingStatus.loaded,
+              profile: new SampleProfileMock())));
       await e.onRendered.first;
       expect(e.querySelector('select'), isNull);
       e.remove();
@@ -150,20 +143,19 @@ main() {
       document.body.append(e);
       await e.onRendered.first;
       events.add(new SampleProfileLoadingProgressEventMock(
-        progress: new SampleProfileLoadingProgressMock(
-          status: M.SampleProfileLoadingStatus.loaded,
-          profile: new SampleProfileMock()
-      )));
+          progress: new SampleProfileLoadingProgressMock(
+              status: M.SampleProfileLoadingStatus.loaded,
+              profile: new SampleProfileMock())));
       await e.onRendered.first;
       expect(e.selectedTag, equals(M.SampleProfileTag.none));
       e.onTagChange.listen(expectAsync((_) {
         expect(e.selectedTag, equals(M.SampleProfileTag.userOnly));
       }, count: 1));
       final select = (e.querySelector('.tag-select') as SelectElement);
-      select.selectedIndex = select.options.indexOf(
-          (select.options.toSet()
-            ..removeAll(select.selectedOptions)).toList().first
-        );
+      select.selectedIndex = select.options.indexOf((select.options.toSet()
+            ..removeAll(select.selectedOptions))
+          .toList()
+          .first);
       select.dispatchEvent(new Event("change"));
       e.remove();
       await e.onRendered.first;