MD Settings: Fix label visibility in subpage search fields

ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar_search_field.html

 <link rel="import" href="chrome://resources/html/polymer.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-spinner/paper-spinner-lite.html">
 <link rel="import" href="chrome://resources/cr_elements/cr_search_field/cr_search_field_behavior.html">
 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 
 <dom-module id="cr-toolbar-search-field">
   <template>
     <style>
       :host {
@@ skipping 57 matching lines @@
         bottom: 0;
         cursor: text;
         left: 0;
         overflow: hidden;
         position: absolute;
         right: 0;
         top: 0;
         white-space: nowrap;
       }
 
-      :host([has-search-text_]) label {
+      :host([has-search-text]) label {
         visibility: hidden;
       }
 
       input {
         -webkit-appearance: none;
         background: transparent;
         border: none;
         color: white;
         font: inherit;
         outline: none;
@@ skipping 44 matching lines @@
       <paper-spinner-lite active>
       </paper-spinner-lite>
     </template>
     <paper-icon-button id="icon" icon="cr:search" title="[[label]]"
         tabindex$="[[computeIconTabIndex_(narrow)]]">
     </paper-icon-button>
     <div id="searchTerm">
       <label id="prompt" for="searchInput">[[label]]</label>
       <input id="searchInput"
           type="search"
-          on-input="onSearchInput_"
+          on-input="onSearchTermInput"
           on-search="onSearchTermSearch"
           on-keydown="onSearchTermKeydown_"
           on-focus="onInputFocus_"
           on-blur="onInputBlur_"
           incremental
           autofocus>
       </input>
     </div>
-    <template is="dom-if" if="[[hasSearchText_]]">
+    <template is="dom-if" if="[[hasSearchText]]">
       <paper-icon-button icon="cr:cancel" id="clearSearch"
           title="[[clearLabel]]" on-tap="clearSearch_">
       </paper-icon-button>
     </template>
   </template>
   <script src="cr_toolbar_search_field.js"></script>
 </dom-module>