MD Settings: Add "Show Google Now cards in the launcher" row in Search section.

chrome/browser/resources/settings/basic_page/basic_page.html

 <link rel="import" href="chrome://resources/html/polymer.html">
 <link rel="import" href="/a11y_page/a11y_page.html">
 <link rel="import" href="/appearance_page/appearance_page.html">
 <link rel="import" href="/downloads_page/downloads_page.html">
 <link rel="import" href="/languages_page/languages_page.html">
 <link rel="import" href="/on_startup_page/on_startup_page.html">
 <link rel="import" href="/passwords_and_forms_page/passwords_and_forms_page.html">
 <link rel="import" href="/people_page/people_page.html">
 <link rel="import" href="/printing_page/printing_page.html">
 <link rel="import" href="/privacy_page/privacy_page.html">
@@ skipping 89 matching lines @@
 <if expr="chromeos">
         <template is="dom-if" if="[[showPage(pageVisibility.device)]]" restamp>
           <settings-section page-title="$i18n{devicePageTitle}"
               section="device">
             <settings-device-page prefs="{{prefs}}"></settings-device-page>
           </settings-section>
         </template>
 </if>
         <template is="dom-if" if="[[showPage(pageVisibility.search)]]" restamp>
           <settings-section page-title="$i18n{searchPageTitle}" section="search">
-            <settings-search-page prefs="[[prefs]]"></settings-search-page>
+            <settings-search-page prefs="{{prefs}}"></settings-search-page>
           </settings-section>
         </template>
 <if expr="chromeos">
         <template is="dom-if"
             if="[[shouldShowAndroidApps_(showAndroidApps, pageVisibility)]]"
             restamp>
           <settings-section page-title="$i18n{androidAppsPageTitle}"
               section="androidApps">
             <settings-android-apps-page prefs="{{prefs}}">
             </settings-android-apps-page>
@@ skipping 122 matching lines @@
                 section="reset">
               <settings-reset-page></settings-reset-page>
             </settings-section>
           </template>
         </div>
       </template>
     </template>
   </template>
   <script src="basic_page.js"></script>
 </dom-module>