Settings People Revamp: Change Picture: Add accessibility-key usage.

chrome/browser/resources/settings/people_page/camera.html

 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/util.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icons/image-icons.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-spinner/paper-spinner.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
 <link rel="import" href="chrome://md-settings/settings_shared_css.html">
 
 <dom-module id="settings-camera">
   <link rel="import" type="css" href="camera.css">
   <template>
     <style include="settings-shared"></style>
     <div hidden="[[!cameraActive]]">
       <div id="perspectiveBox">
         <div id="userImageStreamCrop">
           <video id="cameraVideo" autoplay hidden="[[!cameraOnline_]]"></video>
           <paper-spinner active="[[!cameraOnline_]]"></paper-spinner>
         </div>
       </div>
       <div id="cameraControls">
         <paper-icon-button id="flipPhoto" tabindex="2" icon="image:flip"
             i18n-values="title:flipPhoto" on-tap="onTapFlipPhoto_"
             disabled="[[!cameraOnline_]]">
         </paper-icon-button>
         <paper-icon-button id="takePhoto" tabindex="1" icon="image:camera-alt"
-            i18n-values="title:takePhoto" on-tap="onTapTakePhoto_"
+            i18n-values="title:takePhoto" on-tap="takePhoto"
             disabled="[[!cameraOnline_]]">
         </paper-icon-button>
       </div>
     </div>
   </template>
   <script src="camera.js"></script>
 </dom-module>