CB-10502 Fix camera plugin exception in Chrome when click capture.

The MediaStream.stop() method has been deprecated as of Chrome 47. We were using it, and it was generating an exception.

If stop() method is not found, instead stop each individual track (the new way of doing it).

src/browser/CameraProxy.js

@@ -37,7 +37,7 @@ function takePicture(success, error, opts) {
                 var imageData = readerEvent.target.result;
 
                 return success(imageData.substr(imageData.indexOf(',') + 1));
-            }
+            };
 
             reader.readAsDataURL(inputEvent.target.files[0]);
         };
@@ -60,18 +60,25 @@ function capture(success, errorCallback) {
         // create a canvas and capture a frame from video stream
         var canvas = document.createElement('canvas');
         canvas.getContext('2d').drawImage(video, 0, 0, 320, 240);
-        
+
         // convert image stored in canvas to base64 encoded image
         var imageData = canvas.toDataURL('img/png');
         imageData = imageData.replace('data:image/png;base64,', '');
 
-        // stop video stream, remove video and button
-        localMediaStream.stop();
+        // stop video stream, remove video and button.
+        // Note that MediaStream.stop() is deprecated as of Chrome 47.
+        if (localMediaStream.stop) {
+            localMediaStream.stop();
+        } else {
+            localMediaStream.getTracks().forEach(function (track) {
+                track.stop();
+            });
+        }
         video.parentNode.removeChild(video);
         button.parentNode.removeChild(button);
 
         return success(imageData);
-    }
+    };
 
     navigator.getUserMedia = navigator.getUserMedia ||
                              navigator.webkitGetUserMedia ||
@@ -85,7 +92,7 @@ function capture(success, errorCallback) {
 
         document.body.appendChild(video);
         document.body.appendChild(button);
-    }
+    };
 
     if (navigator.getUserMedia) {
         navigator.getUserMedia({video: true, audio: true}, successCallback, errorCallback);