Elim cr_button from md-settings

chrome/browser/resources/settings/internet_page/network_apnlist.html

 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
-<link rel="import" href="chrome://resources/cr_elements/v1_0/cr_button/cr_button.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/paper-button/paper-button.html">
 <link rel="import" href="chrome://resources/cr_elements/v1_0/network/cr_onc_types.html">
 <link rel="import" href="network_property_list.html">
 
 <dom-module id="network-apnlist">
   <link rel="import" type="css" href="network_apnlist.css">
   <template>
     <div id="outerDiv" class="layout vertical">
       <div id="selectDiv" class="layout horizontal center">
         <span>Access Point:</span>
         <!-- TODO(stevenjb): Use cr-dropdown-menu once available. -->
         <select id="selectApn" value="{{selectedApn::change}}"
             on-change="onSelectApnChange_">
           <template is="dom-repeat"
               items="[[apnSelectList]]" on-dom-change="onSelectApnUpdated_">
             <option value="[[item.AccessPointName]]">[[apnDesc_(item)]]</option>
           </template>
         </select>
       </div>
       <div id="otherDiv" class="layout vertical"
           hidden$="[[!isOtherSelected_(networkState, selectedApn)]]">
         <network-property-list
             fields="[[otherApnFields_]]" network-state="[[otherApn]]"
             edit-field-types="[[otherApnEditTypes_]]"
             on-property-change="onOtherApnChange_">
         </network-property-list>
-        <cr-button on-click="onSaveOther_">Save</cr-button>
+        <paper-button on-tap="onSaveOther_">Save</paper-button>
       </div>
     </div>
   </template>
   <script src="network_apnlist.js"></script>
 </dom-module>