[MD settings] change ClearBrowsingData from a sub-page to a dialog

chrome/browser/resources/settings/clear_browsing_data_page/clear_browsing_data_page.js

Index: chrome/browser/resources/settings/clear_browsing_data_page/clear_browsing_data_page.js
diff --git a/chrome/browser/resources/settings/clear_browsing_data_page/clear_browsing_data_page.js b/chrome/browser/resources/settings/clear_browsing_data_page/clear_browsing_data_page.js
index 5a9b14c2c61c0bdc9027ebcaaa5f5d433c7240e6..4e297a65bd75f15aa8a692122f6b9fdde90f3802 100644
--- a/chrome/browser/resources/settings/clear_browsing_data_page/clear_browsing_data_page.js
+++ b/chrome/browser/resources/settings/clear_browsing_data_page/clear_browsing_data_page.js
@@ -16,7 +16,7 @@
  *    </iron-animated-pages>
  *
  * @group Chrome Settings Elements
- * @element settings-privacy-page
+ * @element settings-clear-browsing-data-page
  */
 Polymer({
   is: 'settings-clear-browsing-data-page',
@@ -96,6 +96,11 @@ Polymer({
   },
 
   /** @private */
+  onCancelTap_: function() {
+    this.$.clearBrowsingDataDialog.close();
+  },
+
+  /** @private */
   onPerformClearBrowsingDataTap_: function() {
     this.$.clearDataButton.disabled = true;

[michaelpg, 2016/03/02 23:19:37]

does this close the dialog? (shouldn't it?)

[dschuyler, 2016/03/03 02:05:03]

Initially, we had a sub-page that would disable the
button while working and then inform the user that
the work was done by enabling the button.  That's
weird with a dialog.  I added a todo to give more
thought to informing the user.

Done.

     chrome.send('performClearBrowserData');