Use dartfmt on Observatory code

runtime/observatory/lib/src/repositories/breakpoint.dart

Index: runtime/observatory/lib/src/repositories/breakpoint.dart
diff --git a/runtime/observatory/lib/src/repositories/breakpoint.dart b/runtime/observatory/lib/src/repositories/breakpoint.dart
index db1e9c7e9ea1a60a4f89be0b3ec809bc862f446a..99a66ca87537a8f4a8f1a55c6937024eb1d3a4cd 100644
--- a/runtime/observatory/lib/src/repositories/breakpoint.dart
+++ b/runtime/observatory/lib/src/repositories/breakpoint.dart
@@ -5,12 +5,13 @@
 part of repositories;
 
 class BreakpointRepository extends M.BreakpointRepository {
-  Future addOnActivation(M.IsolateRef i, M.Instance closure) async{
+  Future addOnActivation(M.IsolateRef i, M.Instance closure) async {
     S.Isolate isolate = i as S.Isolate;
     assert(isolate != null);
     await isolate.addBreakOnActivation(closure);
   }
-  Future remove(M.IsolateRef i, M.Breakpoint breakpoint) async{
+
+  Future remove(M.IsolateRef i, M.Breakpoint breakpoint) async {
     S.Isolate isolate = i as S.Isolate;
     assert(isolate != null);
     await isolate.removeBreakpoint(breakpoint);