Run dartfmt on all files under runtime.

runtime/observatory/tests/service/get_flag_list_rpc_test.dart

Index: runtime/observatory/tests/service/get_flag_list_rpc_test.dart
diff --git a/runtime/observatory/tests/service/get_flag_list_rpc_test.dart b/runtime/observatory/tests/service/get_flag_list_rpc_test.dart
index 73218e40f8f9dc89d934f9cf1ef1b9097ae4797b..2ea82099c89caeca34c21480d692569a4bb0a837 100644
--- a/runtime/observatory/tests/service/get_flag_list_rpc_test.dart
+++ b/runtime/observatory/tests/service/get_flag_list_rpc_test.dart
@@ -19,8 +19,8 @@ var tests = [
   (VM vm) async {
     // Modify a flag.
     var params = {
-      'name' : 'does_not_really_exist',
-      'value' : 'true',
+      'name': 'does_not_really_exist',
+      'value': 'true',
     };
     var result = await vm.invokeRpcNoUpgrade('_setFlag', params);
     expect(result['type'], equals('Error'));
@@ -31,8 +31,8 @@ var tests = [
   (VM vm) async {
     // Modify a flag.
     var params = {
-      'name' : 'trace_profiler',
-      'value' : '123',
+      'name': 'trace_profiler',
+      'value': '123',
     };
     var result = await vm.invokeRpcNoUpgrade('_setFlag', params);
     expect(result['type'], equals('Error'));