MD User Manager: Refactors existing dialogs in User Manager into <user-manager-dialog>

chrome/browser/resources/md_user_manager/import_supervised_user.html

-<link rel="import" href="chrome://md-user-manager/profile_browser_proxy.html">
 <link rel="import" href="chrome://md-user-manager/shared_styles.html">
-<link rel="import" href="chrome://resources/cr_elements/icons.html">
+<link rel="import" href="chrome://md-user-manager/user_manager_dialog.html">
 <link rel="import" href="chrome://resources/html/i18n_behavior.html">
 <link rel="import" href="chrome://resources/html/polymer.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-icon-button/paper-icon-button.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-item/paper-item.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/paper-listbox/paper-listbox.html">
 
 <dom-module id="import-supervised-user">
   <template>
     <style include="shared-styles">
       :host {
         --item-height: 52px;
         --items-container-max-height: calc(var(--item-height) * 4);
       }
 
-      #backdrop {
-        align-items: center;
-        background: rgba(255, 255, 255, 0.6);
-        bottom: 0;
-        display: flex;
-        justify-content: center;
-        left: 0;
-        position: absolute;
-        right: 0;
-        top: 0;
-      }
-
-      #dialog {
-        background: white;
-        border-radius: 2px;
-        box-shadow: 0 16px 24px 2px rgba(0, 0, 0, 0.14),
-                    0 6px 30px 5px rgba(0, 0, 0, 0.12),
-                    0 8px 10px -5px rgba(0, 0, 0, 0.4);
-        color: var(--primary-text-color);
-        width: 512px;
-      }
-
-      #title-bar {
-        -webkit-padding-end: 6px;
-        -webkit-padding-start: 16px;
-        align-items: center;
-        border-bottom: 1px solid rgba(0, 0, 0, .12);
-        font-size: 16px;
-        padding-bottom: 6px;
-        padding-top: 6px;
-      }
-
-      #title-bar paper-icon-button {
-        --paper-icon-button: {
-          padding: 10px;
-        };
-      }
-
       #message {
-        padding: 20px 16px 16px;
+        margin-bottom: 16px;
+        margin-top: 20px;
         white-space: pre-wrap;
         word-wrap: break-word;
       }
 
       paper-listbox {
         max-height: var(--items-container-max-height);
         overflow: auto;
       }
 
       paper-listbox paper-item {
@@ skipping 26 matching lines @@
         -webkit-margin-start: 10px;
         overflow: hidden;
         text-overflow: ellipsis;
         white-space: nowrap;
       }
 
       paper-listbox paper-item .on-device {
         -webkit-margin-start: 10px;
         flex-shrink: 0;
       }
-
-      #actions {
-        margin-top: 20px;
-        padding: 16px;
-      }
     </style>
-    <template is="dom-if" if="[[!popupHidden_]]">
-      <div id="backdrop">
-        <div id="dialog">
-          <div id="title-bar" class="horizontal justified layout">
-            <span id="title">$i18n{supervisedUserImportTitle}</span>
-            <paper-icon-button icon="cr:close" on-tap="onCancelTap_">
-            </paper-icon-button>
-          </div>
-          <div id="message">[[getMessage_(supervisedUsers_)]]</div>
-          <paper-listbox selected="{{supervisedUserIndex_}}">
-            <template is="dom-repeat" items="[[supervisedUsers_]]">
-              <paper-item disabled="[[item.onCurrentDevice]]">
-                <img class="profile-img" src="[[item.iconURL]]"></img>
-                <div class="profile-name">[[item.name]]</div>
-                <div class="on-device" hidden="[[!item.onCurrentDevice]]">
-                  $i18n{supervisedUserAlreadyOnThisDevice}
-                </div>
-              </paper-item>
-            </template>
-          </paper-listbox>
-          <div id="actions" class="horizontal end-justified layout">
-            <paper-button id="cancel" class="action secondary"
-                on-tap="onCancelTap_">
-              $i18n{cancel}
-            </paper-button>
-            <paper-button id="import" class="action primary"
-                on-tap="onImportTap_"
-                disabled="[[isImportDisabled_(supervisedUserIndex_)]]">
-              $i18n{supervisedUserImportOk}
-            </paper-button>
-          </div>
-        </div>
+    <user-manager-dialog id="dialog">
+      <div class="title">$i18n{supervisedUserImportTitle}</div>
+      <div class="body">
+        <div id="message">[[getMessage_(supervisedUsers_)]]</div>
+        <paper-listbox class="no-padding" selected="{{supervisedUserIndex_}}">
+          <template is="dom-repeat" items="[[supervisedUsers_]]">
+            <paper-item disabled="[[item.onCurrentDevice]]">
+              <img class="profile-img" src="[[item.iconURL]]"></img>
+              <div class="profile-name">[[item.name]]</div>
+              <div class="on-device" hidden="[[!item.onCurrentDevice]]">
+                $i18n{supervisedUserAlreadyOnThisDevice}
+              </div>
+            </paper-item>
+          </template>
+        </paper-listbox>
       </div>
-    </template>
+      <div class="footer horizontal end-justified layout">
+        <paper-button id="cancel" class="action secondary" dialog-dismiss>
+          $i18n{cancel}
+        </paper-button>
+        <paper-button id="import" class="action primary"
+            on-tap="onImportTap_"
+            disabled="[[isImportDisabled_(supervisedUserIndex_)]]">
+          $i18n{supervisedUserImportOk}
+        </paper-button>
+      </div>
+    </user-manager-dialog>
   </template>
   <script src="chrome://md-user-manager/import_supervised_user.js"></script>
 </dom-module>