Use dartfmt on Observatory code

runtime/observatory/lib/src/models/repositories/sample_profile.dart

Index: runtime/observatory/lib/src/models/repositories/sample_profile.dart
diff --git a/runtime/observatory/lib/src/models/repositories/sample_profile.dart b/runtime/observatory/lib/src/models/repositories/sample_profile.dart
index 075203f1bbac4d4f6037f35e7488988cdce9060c..9f8e80ea7e18e18cba307a75f1f120f6d231f176 100644
--- a/runtime/observatory/lib/src/models/repositories/sample_profile.dart
+++ b/runtime/observatory/lib/src/models/repositories/sample_profile.dart
@@ -4,20 +4,9 @@
 
 part of models;
 
-enum SampleProfileTag {
-  userVM,
-  userOnly,
-  vmUser,
-  vmOnly,
-  none
-}
+enum SampleProfileTag { userVM, userOnly, vmUser, vmOnly, none }
 
-enum SampleProfileLoadingStatus {
-  disabled,
-  fetching,
-  loading,
-  loaded
-}
+enum SampleProfileLoadingStatus { disabled, fetching, loading, loaded }
 
 bool isSampleProcessRunning(SampleProfileLoadingStatus status) {
   switch (status) {
@@ -42,13 +31,14 @@ abstract class SampleProfileLoadingProgress {
 }
 
 abstract class ClassSampleProfileRepository {
-  Stream<SampleProfileLoadingProgressEvent> get(IsolateRef isolate,
-      ClassRef cls, SampleProfileTag tag);
+  Stream<SampleProfileLoadingProgressEvent> get(
+      IsolateRef isolate, ClassRef cls, SampleProfileTag tag);
   Future enable(IsolateRef isolate, ClassRef cls);
   Future disable(IsolateRef isolate, ClassRef cls);
 }
 
 abstract class IsolateSampleProfileRepository {
-  Stream<SampleProfileLoadingProgressEvent> get(IsolateRef isolate,
-      SampleProfileTag tag, {bool clear: false, bool forceFetch: false});
+  Stream<SampleProfileLoadingProgressEvent> get(
+      IsolateRef isolate, SampleProfileTag tag,
+      {bool clear: false, bool forceFetch: false});
 }