MD Settings: Fix Reset profile dialog scenario that causes a crash.

chrome/browser/resources/settings/reset_page/reset_profile_dialog.html

 <link rel="import" href="chrome://resources/cr_elements/cr_dialog/cr_dialog.html">
 <link rel="import" href="chrome://resources/html/action_link.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/web_ui_listener_behavior.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-flex-layout/classes/iron-flex-layout.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-checkbox/paper-checkbox.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-spinner/paper-spinner.html">
 <link rel="import" href="/reset_page/reset_browser_proxy.html">
 <link rel="import" href="/settings_shared_css.html">
 
 <dom-module id="settings-reset-profile-dialog">
   <link rel="import" type="css" href="chrome://resources/css/action_link.css">
   <template>
     <style include="settings-shared">
       .footer a {
         color: rgb(66, 133, 244);
         text-decoration: none;
         vertical-align: middle;
       }
+
+      paper-spinner {
+        margin: 0 8px;
+      }
     </style>
     <dialog is="cr-dialog" id="dialog">
       <div class="title">$i18n{resetPageTitle}</div>
       <div class="body">
         <span>
           $i18n{resetPageExplanation}
           <a href="$i18nRaw{resetPageLearnMoreUrl}" target="_blank">
             $i18n{learnMore}
           </a>
         </span>
       </div>
       <div class="button-container">
         <paper-spinner id="resetSpinner" active="[[clearingInProgress_]]">

[Dan Beam, 2016/09/15 21:15:40]

is this spinner the right size?  it looks too big in the video

[dpapad, 2016/09/20 00:52:36]

See http://imgur.com/a/6WO3s. It is 28x28, so sizing seems OK, but it is a bit
misaligned (closer to the top of the row).

         </paper-spinner>
         <paper-button class="cancel-button" on-tap="onCancelTap_"
-            id="cancel">$i18n{cancel}</paper-button>
+            id="cancel" disabled="[[clearingInProgress_]]">

[Dan Beam, 2016/09/15 21:15:40]

wat?  you're disabling the /cancel/ button?  why not disable the ... clearing
button?

[dpapad, 2016/09/20 00:52:36]

The clearing button is already being disabled, using the same boolean.

+          $i18n{cancel}
+        </paper-button>
         <paper-button class="action-button" on-tap="onResetTap_"
             id="reset" disabled="[[clearingInProgress_]]">
           $i18n{resetPageCommit}
         </paper-button>
       </div>
       <div class="footer">
         <paper-checkbox id="sendSettings"
             checked>$i18n{resetPageFeedback}</paper-checkbox>
         <a is="action-link"
             on-tap="onShowReportedSettingsTap_">$i18n{viewReportedSettings}</a>
       </div>
     </dialog>
   </template>
   <script src="reset_profile_dialog.js"></script>
 </dom-module>