MD Settings: Deactivate the Camera when leaving the Change Picture page.

chrome/test/data/webui/settings/people_page_change_picture_test.js

 // 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.
 
 cr.define('settings_people_page_change_picture', function() {
   /**
    * @constructor
    * @implements {settings.ChangePictureBrowserProxy}
    * @extends {settings.TestBrowserProxy}
    */
@@ skipping 89 matching lines @@
         settings.ChangePictureBrowserProxyImpl.instance_ = browserProxy;
         PolymerTest.clearBody();
         changePicture = document.createElement('settings-change-picture');
         document.body.appendChild(changePicture);
 
         settingsCamera = changePicture.$$('settings-camera');
         assertTrue(!!settingsCamera);
         discardControlBar = changePicture.$.discardControlBar;
         assertTrue(!!discardControlBar);
 
+        changePicture.currentRouteChanged(settings.Route.CHANGE_PICTURE);
+
         return browserProxy.whenCalled('initialize').then(function() {
           Polymer.dom.flush();
         });
       });
 
       teardown(function() { changePicture.remove(); });
 
       test('ChangePictureSelectCamera', function() {
         var cameraIcon = changePicture.$.cameraImage;
         assertTrue(!!cameraIcon);
@@ skipping 12 matching lines @@
         expectFalse(settingsCamera.cameraActive);
 
         MockInteractions.tap(cameraIcon);
 
         Polymer.dom.flush();
         expectFalse(cameraIcon.hidden);
         expectTrue(settingsCamera.cameraActive);
         expectEquals(ChangePictureSelectionTypes.CAMERA,
                      getSelectedItem().dataset.type);
         expectTrue(discardControlBar.hidden);
+
+        // Ensure that the camera is deactivated if user navigates away.
+        changePicture.currentRouteChanged(settings.Route.BASIC);
+        expectFalse(settingsCamera.cameraActive);
       });
 
       test('ChangePictureProfileImage', function() {
         var profileImage = changePicture.$.profileImage;
         assertTrue(!!profileImage);
 
         expectEquals(null, getSelectedItem());
         MockInteractions.tap(profileImage);
 
         return browserProxy.whenCalled('selectProfileImage').then(function() {
@@ skipping 69 matching lines @@
       });
     });
   }
 
   return {
     registerTests: function() {
       registerChangePictureTests();
     },
   };
 });