MD settings: make update errors text-selectable.

chrome/browser/resources/settings/about_page/about_page.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 
 <link rel="import" href="about_page_browser_proxy.html">
 <link rel="import" href="../i18n_setup.html">
 <link rel="import" href="../icons.html">
 <link rel="import" href="../lifetime_browser_proxy.html">
 <link rel="import" href="../route.html">
 <link rel="import" href="../settings_page/main_page_behavior.html">
 <link rel="import" href="../settings_page/settings_animated_pages.html">
 <link rel="import" href="../settings_page/settings_section.html">
@@ skipping 18 matching lines @@
 </if>
 
 <dom-module id="settings-about-page">
   <template>
     <style include="settings-shared settings-page-styles">
       :host {
         --about-page-image-space: 10px;
       }
 
       .copyable {
-        -webkit-user-select: text;
+        user-select: text;
       }
 
       .info-section {
         margin-bottom: 12px;
       }
 
       .padded {
         padding-bottom: 10px;
         padding-top: 10px;
       }
@@ skipping 50 matching lines @@
             <div class="settings-box two-line">
               <!-- TODO(dpapad): Investigate why vulcanize does not handle well
                 a new line after "getIconSrc_(", causes incorrect src URL -->
               <iron-icon
                   hidden="[[!showUpdateStatus_]]"
                   icon$="[[getIcon_(
                       obsoleteSystemInfo_, currentUpdateStatusEvent_)]]"
                   src="[[getIconSrc_(obsoleteSystemInfo_, currentUpdateStatusEvent_)]]">
               </iron-icon>
               <div class="start padded">
-                <div id="updateStatusMessage" hidden="[[!showUpdateStatus_]]"
+                <div id="updateStatusMessage" class="copyable"
+                    hidden="[[!showUpdateStatus_]]"
 <if expr="not chromeos">
                     inner-h-t-m-l="[[getUpdateStatusMessage_(
                         currentUpdateStatusEvent_)]]">
 </if>
 <if expr="chromeos">
                     inner-h-t-m-l="[[getUpdateStatusMessage_(
                         currentUpdateStatusEvent_, targetChannel_)]]">
 </if>
                 </div>
                 <span id="deprecationWarning"
@@ skipping 109 matching lines @@
 <if expr="chromeos">
     <template is="dom-if" if="[[showUpdateWarningDialog_]]" restamp>
       <settings-update-warning-dialog update-info="[[updateInfo_]]"
           on-close="onUpdateWarningDialogClose_">
       </settings-update-warning-dialog>
     </template>
 </if>
   </template>
   <script src="about_page.js"></script>
 </dom-module>