Accessibility fixes for quick unlock settings.

ui/webui/resources/cr_elements/cr_dialog/cr_dialog.html

 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/assert.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
+<link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-icon-button/paper-icon-button.html">
 
 <dom-module id="cr-dialog">
   <template>
     <style>
       :host {
         border: 0;
         border-radius: 2px;
         bottom: 0;
         color: inherit;
@@ skipping 71 matching lines @@
       :host ::content .footer {
         background-color: var(--paper-grey-200);
         border-bottom-left-radius: inherit;
         border-bottom-right-radius: inherit;
         margin: 0;
         padding: 12px 20px;
       }
     </style>
     <div class="title-container">
       <content select=".title"></content>
-      <paper-icon-button icon="cr:clear" on-tap="cancel" id="close">
+      <paper-icon-button icon="cr:clear" on-tap="cancel" id="close"
+          alt$="[[getCloseA11yText_()]]">

[tommycli, 2016/10/25 18:13:50]

Can you use the $i18n{} macro here?

[jdufault, 2016/10/26 22:38:36]

Nope :(. The other files in cr_elements/* use the same approach as this CL.

[tommycli, 2016/10/27 00:13:25]

Ah. A little gross, but if the other cr_elements do this too, I guess it's ok.

[Dan Beam, 2016/10/27 01:25:48]

which other elements?  the ones i've used generally inject strings from outer
scope (i.e. cr_toolbar does this:
https://cs.chromium.org/chromium/src/chrome/browser/resources/md_downloads/to...)

[jdufault, 2016/10/27 19:13:55]

cr_policy_indicator_behavior.js, cr_network_select.js, cr_network_list_item.js,
cr_policy_network_indicator.js, cr_onc_types.js

       </paper-icon-button>
     </div>
     <div class="body-container">
       <content select=".body"></content>
     </div>
     <content select=".button-container"></content>
     <content select=".footer"></content>
   </template>
   <script src="cr_dialog.js"></script>
 </dom-module>