Run dartfmt on all files under runtime.

runtime/observatory/tests/service/get_vm_timeline_rpc_test.dart

Index: runtime/observatory/tests/service/get_vm_timeline_rpc_test.dart
diff --git a/runtime/observatory/tests/service/get_vm_timeline_rpc_test.dart b/runtime/observatory/tests/service/get_vm_timeline_rpc_test.dart
index 63277b7e7fd567a211d11582b7392d1ad34f22b9..0024f1022980a5a779a60485e1b028b551ac63fe 100644
--- a/runtime/observatory/tests/service/get_vm_timeline_rpc_test.dart
+++ b/runtime/observatory/tests/service/get_vm_timeline_rpc_test.dart
@@ -105,10 +105,8 @@ var tests = [
     int origin = timeOrigin(dartEvents);
     int extent = timeDuration(dartEvents, origin);
     // Query for the timeline with the time window for Dart events.
-    result = await vm.invokeRpcNoUpgrade('_getVMTimeline', {
-      'timeOriginMicros': origin,
-      'timeExtentMicros': extent
-    });
+    result = await vm.invokeRpcNoUpgrade('_getVMTimeline',
+        {'timeOriginMicros': origin, 'timeExtentMicros': extent});
     // Verify that we received fewer events than before.
     expect(result['traceEvents'].length, lessThan(numEvents));
     // Verify that we have the same number of Dart events.