Remove async onBeginFrame

Author: Emmanuel Garcia

testing/scenario_app/lib/main.dart

@@ -91,7 +91,7 @@ void _onBeginFrame(Duration duration) {
     scene.dispose();
     return;
   }
-  unawaited(currentScenario!.onBeginFrame(duration));
+  currentScenario!.onBeginFrame(duration);
 }
 
 void _onDrawFrame() {

testing/scenario_app/lib/src/animated_color_square.dart

@@ -33,7 +33,7 @@ class AnimatedColorSquareScenario extends Scenario {
   );
 
   @override
-  Future<void> onBeginFrame(Duration duration) async {
+  void onBeginFrame(Duration duration) {
     final SceneBuilder builder = SceneBuilder();
     final PictureRecorder recorder = PictureRecorder();
     final Canvas canvas = Canvas(recorder);

testing/scenario_app/lib/src/bogus_font_text.dart

@@ -21,7 +21,7 @@ class BogusFontText extends Scenario {
   double _screenWidth = 700;
 
   @override
-  Future<void> onBeginFrame(Duration duration) async {
+  void onBeginFrame(Duration duration) {
     final SceneBuilder builder = SceneBuilder();
     final PictureRecorder recorder = PictureRecorder();
     final Canvas canvas = Canvas(recorder);

testing/scenario_app/lib/src/initial_route_reply.dart

@@ -18,7 +18,7 @@ class InitialRouteReply extends Scenario {
         super(dispatcher);
 
   @override
-  Future<void> onBeginFrame(Duration duration) async {
+  void onBeginFrame(Duration duration) {
     sendJsonMethodCall(
       dispatcher: dispatcher,
       channel: 'initial_route_test_channel',

testing/scenario_app/lib/src/locale_initialization.dart

@@ -20,7 +20,7 @@ class LocaleInitialization extends Scenario {
 
   /// Start off by sending the supported locales list via semantics.
   @override
-  Future<void> onBeginFrame(Duration duration) async {
+  void onBeginFrame(Duration duration) {
     // Doesn't matter what we draw. Just paint white.
     final SceneBuilder builder = SceneBuilder();
     final PictureRecorder recorder = PictureRecorder();