Expand the footer in the material design Clear Browsing Data dialog.

chrome/test/data/webui/settings/privacy_page_test.js

Index: chrome/test/data/webui/settings/privacy_page_test.js
diff --git a/chrome/test/data/webui/settings/privacy_page_test.js b/chrome/test/data/webui/settings/privacy_page_test.js
index 5bbdc24d18301149a3bd08cbec7881bf0bbb9dc7..5453a475dc51b0263bc5410fe7cc1ba7dec9ed50 100644
--- a/chrome/test/data/webui/settings/privacy_page_test.js
+++ b/chrome/test/data/webui/settings/privacy_page_test.js
@@ -27,7 +27,10 @@ cr.define('settings_privacy_page', function() {
    * @implements {settings.ClearBrowsingDataBrowserProxy}
    */
   function TestClearBrowsingDataBrowserProxy() {
-    settings.TestBrowserProxy.call(this, ['clearBrowsingData']);
+    settings.TestBrowserProxy.call(this, [
+      'initialize',
+      'clearBrowsingData',
+    ]);
 
     /**
      * The promise to return from |clearBrowsingData|.
@@ -52,6 +55,11 @@ cr.define('settings_privacy_page', function() {
       return this.clearBrowsingDataPromise_ !== null ?
           this.clearBrowsingDataPromise_ : Promise.resolve();
     },
+
+    /** @override */
+    initialize: function() {
+      this.methodCalled('initialize');
+    },
   };
 
   function registerNativeCertificateManagerTests() {