Dart: Refactors Proxies

examples/dart/camera_video/lib/main.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This example makes use of mojo:camera which is available only when
 // running on Android. It repeatedly captures camera video frame images
 // and displays it in a mojo view.
 //
 // Example usage:
 //   pub get
@@ skipping 44 matching lines @@
 }
 
 void beginFrame(double timeStamp) {
   Rect paintBounds = new Rect.fromLTWH(0.0, 0.0, ui.view.width, ui.view.height);
   Picture picture = paint(paintBounds);
   ui.Scene scene = composite(picture, paintBounds);
   ui.view.scene = scene;
 }
 
 void drawNextPhoto() {
-  var future = camera.ptr.getLatestFrame();
+  var future = camera.getLatestFrame();
   future.then((response) {
     if (response.content == null) {
       drawNextPhoto();
       return;
     }
 
     final imageFrame = decodeImageFromDataPipe(response.content);
     imageFrame.then((frame) {
       if (frame != null) {
         image = frame;
         ui.view.scheduleFrame();
         drawNextPhoto();
       }
     });
   });
 }
 
 void main() {
   embedder.connectToService("mojo:camera", camera);
   drawNextPhoto();
   ui.view.setFrameCallback(beginFrame);
 }