Settings: Implement sub-subpages, and clean up some animations.

chrome/browser/resources/settings/search_page/search_page.html

Index: chrome/browser/resources/settings/search_page/search_page.html
diff --git a/chrome/browser/resources/settings/search_page/search_page.html b/chrome/browser/resources/settings/search_page/search_page.html
index c783b11278160340cc0890f2e6a40dd4d647b748..2d66df958704c5c6b6c06abc9892ecbfa36de3e9 100644
--- a/chrome/browser/resources/settings/search_page/search_page.html
+++ b/chrome/browser/resources/settings/search_page/search_page.html
@@ -1,5 +1,6 @@
 <link rel="import" href="chrome://resources/polymer/v1_0/polymer/polymer.html">
 <link rel="import" href="chrome://resources/polymer/v1_0/more-routing/more-routing.html">
+<link rel="import" href="chrome://resources/polymer/v1_0/neon-animation/neon-animatable.html">
 <link rel="import" href="chrome://resources/cr_elements/v1_0/cr_button/cr_button.html">
 <link rel="import" href="chrome://md-settings/checkbox/checkbox.html">
 <link rel="import" href="chrome://md-settings/search_engines_page/search_engines_page.html">
@@ -34,6 +35,19 @@
           <h2 i18n-content="searchEnginesLabel"></h2>
         </div>
         <cr-settings-search-engines-page></cr-settings-search-engines-page>
+        <cr-button class="search-engines-subpage"
+            i18n-content="advancedPageTitle"
+            on-click="searchEnginesSubpage_" raised>
+        </cr-button>
+      </neon-animatable>
+      <neon-animatable id="search-engines-subpage">
+        <!-- This sub-subpage is purely a placeholder to provide an example. -->
+        <div class="subheader">
+          <paper-icon-button icon="arrow-back" on-tap="handleBack_">
+          </paper-icon-button>
+          <h2 i18n-content="searchEnginesLabel"></h2>
+        </div>
+        <p i18n-content="searchExplanation"></p>
       </neon-animatable>
     </cr-settings-animated-pages>
   </template>