Use dartfmt on Observatory code

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

Index: runtime/observatory/lib/src/repositories/allocation_profile.dart
diff --git a/runtime/observatory/lib/src/repositories/allocation_profile.dart b/runtime/observatory/lib/src/repositories/allocation_profile.dart
index 4b1a73d78d2c0f0541f7bbba638c1760cf6a2723..aedfb3a538fa98927fe14fdaceb7798324ac78c9 100644
--- a/runtime/observatory/lib/src/repositories/allocation_profile.dart
+++ b/runtime/observatory/lib/src/repositories/allocation_profile.dart
@@ -7,8 +7,8 @@ part of repositories;
 class AllocationProfileRepository implements M.AllocationProfileRepository {
   static const _api = '_getAllocationProfile';
 
-  Future<M.AllocationProfile> get(M.IsolateRef i, {bool gc: false,
-                                                   bool reset: false}) async {
+  Future<M.AllocationProfile> get(M.IsolateRef i,
+      {bool gc: false, bool reset: false}) async {
     assert(gc != null);
     assert(reset != null);
     S.Isolate isolate = i as S.Isolate;