MD Settings: Implementing a "no results" page.

chrome/browser/resources/settings/settings_main/settings_main.html

 <link rel="import" href="chrome://resources/cr_elements/icons.html">
 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="chrome://resources/html/promise_resolver.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/iron-icon/iron-icon.html">
 <link rel="import" href="/about_page/about_page.html">
 <link rel="import" href="/advanced_page/advanced_page.html">
 <link rel="import" href="/basic_page/basic_page.html">
 <link rel="import" href="/settings_main/settings_main_rendered.html">
 <link rel="import" href="/settings_page/main_page_behavior.html">
 <link rel="import" href="/settings_vars_css.html">
@@ skipping 18 matching lines @@
         margin-bottom: -var(--settings-page-vertical-margin);
       }
 
       #toggleSpacer {
         padding-top: 33px;  /* Part of a 48px spacer (33px + 12px + 3px). */
       }
 
       iron-icon {
         -webkit-margin-start: 16px;
       }
+
+      #no-search-results {
+        align-items: center;
+        display: flex;
+        flex-direction: column;
+        margin-top: 80px;
+      }
+
+      #no-search-results div:first-child {
+        font-size: 120%;
+        margin-bottom: 10px;
+      }
     </style>
     <content select="paper-icon-button"></content>
+    <div id="no-search-results" hidden$="[[!showNoResultsFound_]]">
+      <div>$i18n{searchNoResults}</div>
+      <div>$i18nRaw{searchNoResultsHelp}</div>
+    </div>
     <template is="dom-if" if="[[showPages_.basic]]">
       <settings-basic-page prefs="{{prefs}}" current-route="{{currentRoute}}">
       </settings-basic-page>
     </template>
     <template is="dom-if"
         if="[[showAdvancedToggle_(showPages_.basic, inSubpage_)]]">
       <div id="toggleSpacer"></div>
-      <div id="toggleContainer">
+      <div id="toggleContainer" hidden$="[[showNoResultsFound_]]">
         <div id="advancedToggle" on-tap="toggleAdvancedPage_">
           <span>$i18n{advancedPageTitle}</span>
           <iron-icon icon="[[arrowState_(showPages_.advanced)]]"></iron-icon>
         </div>
       </div>
     </template>
     <template is="dom-if" if="[[showPages_.advanced]]">
       <settings-advanced-page prefs="{{prefs}}"
           current-route="{{currentRoute}}">
       </settings-advanced-page>
     </template>
     <template is="dom-if" if="[[showPages_.about]]">
       <settings-about-page current-route="{{currentRoute}}">
       </settings-about-page>
     </template>
   </template>
   <script src="settings_main.js"></script>
   <script src="/search_settings.js"></script>
 </dom-module>