[MD WebUI] Move icons used in Bookmarks and Settings to shared file.

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

 <link rel="import" href="chrome://resources/html/polymer.html">
+<link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/util.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="/icons.html">
 <link rel="import" href="/settings_shared_css.html">
 
 <dom-module id="settings-camera">
   <template>
     <style include="settings-shared">
       #perspectiveBox {
         -webkit-perspective: 600px;
         height: 228px;
         width: 228px;
       }
@@ skipping 51 matching lines @@
     </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="settings:flip" title="$i18n{flipPhoto}"
+            icon="cr:flip" title="$i18n{flipPhoto}"
             on-tap="onTapFlipPhoto_" disabled="[[!cameraOnline_]]">
         </paper-icon-button>
         <paper-icon-button id="takePhoto" tabindex="1"
-            icon="settings:camera-alt" title="$i18n{takePhoto}"
+            icon="cr:camera-alt" title="$i18n{takePhoto}"
             on-tap="takePhoto" disabled="[[!cameraOnline_]]">
         </paper-icon-button>
       </div>
     </div>
   </template>
   <script src="camera.js"></script>
 </dom-module>