Run dartfmt on all files under runtime.

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

Index: runtime/observatory/tests/observatory_ui/mocks/repositories/script.dart
diff --git a/runtime/observatory/tests/observatory_ui/mocks/repositories/script.dart b/runtime/observatory/tests/observatory_ui/mocks/repositories/script.dart
index cb6d2eb71a38c8b063ff55c4dbc4af4fbfdc031f..efa60ae75d20e36f32ad106d7caea1e1bbb98b0e 100644
--- a/runtime/observatory/tests/observatory_ui/mocks/repositories/script.dart
+++ b/runtime/observatory/tests/observatory_ui/mocks/repositories/script.dart
@@ -4,16 +4,15 @@
 
 part of mocks;
 
-typedef Future<M.Script>
-    ScriptRepositoryMockCallback(M.IsolateRef isolate, String id);
+typedef Future<M.Script> ScriptRepositoryMockCallback(
+    M.IsolateRef isolate, String id);
 
 class ScriptRepositoryMock implements M.ScriptRepository {
   final ScriptRepositoryMockCallback _get;
 
-  ScriptRepositoryMock({ScriptRepositoryMockCallback getter})
-    : _get = getter;
+  ScriptRepositoryMock({ScriptRepositoryMockCallback getter}) : _get = getter;
 
-  Future<M.Script> get(M.IsolateRef isolate, String id){
+  Future<M.Script> get(M.IsolateRef isolate, String id) {
     if (_get != null) {
       return _get(isolate, id);
     }