WebUI: swap paper-dropdown-menu out for md-select.

chrome/browser/resources/md_user_manager/create_profile.html

Index: chrome/browser/resources/md_user_manager/create_profile.html
diff --git a/chrome/browser/resources/md_user_manager/create_profile.html b/chrome/browser/resources/md_user_manager/create_profile.html
index 6d42a095f7d1d4b4568c7f1bf155d733e84af4b5..1e8ecfd30c7e3f58fecf3c549f2a40de2de004bd 100644
--- a/chrome/browser/resources/md_user_manager/create_profile.html
+++ b/chrome/browser/resources/md_user_manager/create_profile.html
@@ -7,6 +7,7 @@
 <link rel="import" href="chrome://resources/html/cr.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/html/md_select_css.html">
 <link rel="import" href="chrome://resources/html/util.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/iron-flex-layout-classes.html">
@@ -20,7 +21,7 @@
 
 <dom-module id="create-profile">
   <template>
-    <style include="shared-styles iron-positioning">
+    <style include="shared-styles iron-positioning md-select">
       .container {
         color: var(--primary-text-color);
         width: var(--page-width);
@@ -174,17 +175,17 @@
           </div>
           <template is="dom-if" if="[[isSupervised_]]">
             <template is="dom-if" if="[[isSignedIn_(signedInUsers_)]]">
-              <paper-dropdown-menu label="$i18n{selectAnAccount}" no-label-float>
-                <paper-listbox class="dropdown-content"
-                    selected="{{signedInUserIndex_}}"
-                    attr-for-selected="data-user-index">
+              <div class="md-select-wrapper">
+                <select class="md-select" on-change="onAccountChanged_">
+                  <option disabled selected>$i18n{selectAnAccount}</option>
                   <template is="dom-repeat" items="[[signedInUsers_]]">
-                    <paper-item data-user-index$="[[index]]">
+                    <option value="[[index]]">
                       [[item.username]]
-                    </paper-item>
+                    </option>
                   </template>
-                </paper-listbox>
-              </paper-dropdown-menu>
+                </select>
+                <span class="md-select-underline"></span>
+              </div>
               <a id="import-user" is="action-link" on-tap="onImportUserTap_"
                   hidden="[[isImportUserLinkHidden_(createInProgress_,
                                                     loadingSupervisedUsers_,