Run dartfmt on all files under runtime.

runtime/observatory/tests/observatory_ui/mocks/repositories/class.dart

Index: runtime/observatory/tests/observatory_ui/mocks/repositories/class.dart
diff --git a/runtime/observatory/tests/observatory_ui/mocks/repositories/class.dart b/runtime/observatory/tests/observatory_ui/mocks/repositories/class.dart
index debb14c229a4818363eaff55e814ae9c7544994f..b798fca31d104a5dcf1cc8f16efd70dbb50b8b40 100644
--- a/runtime/observatory/tests/observatory_ui/mocks/repositories/class.dart
+++ b/runtime/observatory/tests/observatory_ui/mocks/repositories/class.dart
@@ -5,26 +5,27 @@
 part of mocks;
 
 typedef Future<M.Class> ClassRepositoryMockObjectCallback(M.Isolate isolate);
-typedef Future<M.Class>
-        ClassRepositoryMockGetterCallback(M.Isolate isolate, String id);
+typedef Future<M.Class> ClassRepositoryMockGetterCallback(
+    M.Isolate isolate, String id);
 
 class ClassRepositoryMock implements M.ClassRepository {
   final ClassRepositoryMockObjectCallback _object;
   final ClassRepositoryMockGetterCallback _get;
 
-  ClassRepositoryMock({ClassRepositoryMockObjectCallback object,
-                       ClassRepositoryMockGetterCallback getter})
-    : _object = object,
-      _get = getter;
+  ClassRepositoryMock(
+      {ClassRepositoryMockObjectCallback object,
+      ClassRepositoryMockGetterCallback getter})
+      : _object = object,
+        _get = getter;
 
-  Future<M.Class> getObject(M.IsolateRef i){
+  Future<M.Class> getObject(M.IsolateRef i) {
     if (_object != null) {
       return _object(i);
     }
     return new Future.value(null);
   }
 
-  Future<M.Class> get(M.IsolateRef i, String id){
+  Future<M.Class> get(M.IsolateRef i, String id) {
     if (_get != null) {
       return _get(i, id);
     }