Revert "[vm] Don't enable the profiler by default. Enable the profiler at startup with --observe, o…

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 226ee35608b73f47e8993003fa47b1f6a618700e..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
@@ -12,8 +12,6 @@ import '../mocks.dart';
 main() {
   SampleBufferControlElement.tag.ensureRegistration();
 
-  const vm = const VMMock();
-
   group('instantiation', () {
     SampleProfileLoadingProgressMock progress;
     StreamController<SampleProfileLoadingProgressEventMock> events;
@@ -22,7 +20,7 @@ main() {
       events = new StreamController<SampleProfileLoadingProgressEventMock>();
     });
     test('no additional parameters', () {
-      final e = new SampleBufferControlElement(vm, progress, events.stream);
+      final e = new SampleBufferControlElement(progress, events.stream);
       expect(e, isNotNull, reason: 'element correctly created');
       expect(e.progress, equals(progress));
       expect(e.selectedTag, equals(M.SampleProfileTag.none));
@@ -30,7 +28,7 @@ main() {
     });
     test('selected tag', () {
       const tag = M.SampleProfileTag.userOnly;
-      final e = new SampleBufferControlElement(vm, progress, events.stream,
+      final e = new SampleBufferControlElement(progress, events.stream,
           selectedTag: tag);
       expect(e, isNotNull, reason: 'element correctly created');
       expect(e.progress, equals(progress));
@@ -38,7 +36,7 @@ main() {
       expect(e.showTag, isTrue);
     });
     test('show tag (true)', () {
-      final e = new SampleBufferControlElement(vm, progress, events.stream,
+      final e = new SampleBufferControlElement(progress, events.stream,
           showTag: true);
       expect(e, isNotNull, reason: 'element correctly created');
       expect(e.progress, equals(progress));
@@ -46,7 +44,7 @@ main() {
       expect(e.showTag, isTrue);
     });
     test('show tag (false)', () {
-      final e = new SampleBufferControlElement(vm, progress, events.stream,
+      final e = new SampleBufferControlElement(progress, events.stream,
           showTag: false);
       expect(e, isNotNull, reason: 'element correctly created');
       expect(e.progress, equals(progress));
@@ -62,7 +60,7 @@ main() {
       events = new StreamController<SampleProfileLoadingProgressEventMock>();
     });
     test('created after attachment', () async {
-      final e = new SampleBufferControlElement(vm, progress, events.stream);
+      final e = new SampleBufferControlElement(progress, events.stream);
       document.body.append(e);
       await e.onRendered.first;
       expect(e.children.length, isNonZero, reason: 'has elements');
@@ -71,7 +69,7 @@ main() {
       expect(e.children.length, isZero, reason: 'is empty');
     });
     test('listen for status changes', () async {
-      final e = new SampleBufferControlElement(vm, progress, events.stream);
+      final e = new SampleBufferControlElement(progress, events.stream);
       expect(events.hasListener, isFalse);
       document.body.append(e);
       await e.onRendered.first;
@@ -83,7 +81,7 @@ main() {
       await e.onRendered.first;
     });
     test('follow updates changes', () async {
-      final e = new SampleBufferControlElement(vm, progress, events.stream);
+      final e = new SampleBufferControlElement(progress, events.stream);
       document.body.append(e);
       await e.onRendered.first;
       expect(e.querySelector('select'), isNull);
@@ -108,7 +106,7 @@ main() {
       await e.onRendered.first;
     });
     test('follow updates changes (no tag)', () async {
-      final e = new SampleBufferControlElement(vm, progress, events.stream,
+      final e = new SampleBufferControlElement(progress, events.stream,
           showTag: false);
       document.body.append(e);
       await e.onRendered.first;
@@ -141,7 +139,7 @@ main() {
       events = new StreamController<SampleProfileLoadingProgressEventMock>();
     });
     test('onModeChange', () async {
-      final e = new SampleBufferControlElement(vm, progress, events.stream);
+      final e = new SampleBufferControlElement(progress, events.stream);
       document.body.append(e);
       await e.onRendered.first;
       events.add(new SampleProfileLoadingProgressEventMock(