Implement important sites dialog for desktop.

chrome/browser/resources/settings/clear_browsing_data_dialog/clear_browsing_data_dialog.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @fileoverview 'settings-clear-browsing-data-dialog' allows the user to delete
  * browsing data that has been cached by Chromium.
  */
 Polymer({
   is: 'settings-clear-browsing-data-dialog',
@@ skipping 10 matching lines @@
     },
 
     /**
      * Results of browsing data counters, keyed by the suffix of
      * the corresponding data type deletion preference, as reported
      * by the C++ side.
      * @private {!Object<string>}
      */
     counters_: {
       type: Object,
-      value: {
-        // Will be filled as results are reported.
+      // Will be filled as results are reported.
+      value: function() {
+        return {};
       }
     },
 
     /**
      * List of options for the dropdown menu.
      * @private {!DropdownMenuOptionList}
      */
     clearFromOptions_: {
       readOnly: true,
       type: Array,
@@ skipping 18 matching lines @@
       value: function() {
         return loadTimeData.getBoolean('isSupervised');
       },
     },
 
     /** @private */
     showHistoryDeletionDialog_: {
       type: Boolean,
       value: false,
     },
+
+    /** @private {!Array<ImportantSite>} */
+    importantSites_: {
+      type: Array,
+      value: function() {
+        return [];
+      }
+    },
+
+    /** @private */
+    importantSitesFlagEnabled_: {
+      type: Boolean,
+      value: false,
+    },
+
+    /** @private */
+    showImportantSitesDialog_: {
+      type: Boolean,
+      value: false
+    },
   },
 
   /** @private {settings.ClearBrowsingDataBrowserProxy} */
   browserProxy_: null,
 
   /** @override */
   ready: function() {
     this.$.clearFrom.menuOptions = this.clearFromOptions_;
     this.addWebUIListener(
         'update-footer',
         this.updateFooter_.bind(this));
     this.addWebUIListener(
         'update-counter-text',
         this.updateCounterText_.bind(this));
   },
 
   /** @override */
   attached: function() {
     this.browserProxy_ =
         settings.ClearBrowsingDataBrowserProxyImpl.getInstance();
-    this.browserProxy_.initialize().then(function() {
-      this.$.dialog.showModal();
-    }.bind(this));
+    this.browserProxy_.initialize()
+        .then(function() {
+          this.$.clearBrowsingDataDialog.showModal();
+          return this.browserProxy_.fetchImportantSites();
+        }.bind(this))
+        .then(this.receiveImportantSites_.bind(this));
   },
 
   /**
+   * @param {!ImportantSitesResponse} result
+   * @private
+   */
+  receiveImportantSites_: function(result) {
+    this.importantSitesFlagEnabled_ = result.flagEnabled;
+    this.set('importantSites_', result.importantSites);
+  },
+
+  /**
    * Updates the footer to show only those sentences that are relevant to this
    * user.
    * @param {boolean} syncing Whether the user is syncing data.
    * @param {boolean} otherFormsOfBrowsingHistory Whether the user has other
    *     forms of browsing history in their account.
    * @private
    */
   updateFooter_: function(syncing, otherFormsOfBrowsingHistory) {
     this.$.googleFooter.hidden = !otherFormsOfBrowsingHistory;
     this.$.syncedDataSentence.hidden = !syncing;
-    this.$.dialog.classList.add('fully-rendered');
+    this.$.clearBrowsingDataDialog.classList.add('fully-rendered');
   },
 
   /**
    * Updates the text of a browsing data counter corresponding to the given
    * preference.
    * @param {string} prefName Browsing data type deletion preference.
    * @param {string} text The text with which to update the counter
    * @private
    */
   updateCounterText_: function(prefName, text) {
     // Data type deletion preferences are named "browser.clear_data.<datatype>".
     // Strip the common prefix, i.e. use only "<datatype>".
     var matches = prefName.match(/^browser\.clear_data\.(\w+)$/);
     this.set('counters_.' + assert(matches[1]), text);
   },
 
   /**
+   * @return {boolean} Whether the ImportantSites dialog should be shown.
+   * @private
+   */
+  shouldShowImportantSites_: function() {
+    if (!this.importantSitesFlagEnabled_)
+      return false;
+    if (!this.$.cookiesCheckbox.checked && !this.$.cacheCheckbox.checked)
+      return false;
+
+    var haveImportantSites = this.importantSites_.length > 0;
+    chrome.send(
+        'metricsHandler:recordBooleanHistogram',
+        ['History.ClearBrowsingData.ImportantDialogShown', haveImportantSites]);
+    return haveImportantSites;
+  },
+
+  /**
    * Handles the tap on the Clear Data button.
    * @private
    */
   onClearBrowsingDataTap_: function() {
+    if (this.shouldShowImportantSites_()) {
+      this.showImportantSitesDialog_ = true;
+      Polymer.dom.flush();  // Wait for dom-if.

[Dan Beam, 2017/05/16 03:25:25]

i think using this.async() is preferred to Polymer.dom.flush()

[dullweber, 2017/05/16 11:08:49]

Done.

+      this.$$('#importantSitesDialog').showModal();
+      this.$.clearBrowsingDataDialog.close();
+    } else {
+      this.clearBrowsingData_()
+    }
+  },
+
+  /**
+   * Handles closing of the clear browsing data dialog. Stops the close
+   * event from propagating if another dialog is shown to prevent the
+   * privacy-page from closing this dialog.
+   * @private
+   */
+  onClearBrowsingDataDialogClose_: function(event) {
+    if (this.showImportantSitesDialog_)
+      event.stopPropagation()
+  },
+
+  /**
+   * Clears browsing data and maybe shows a history notice.
+   * @private
+   */
+  clearBrowsingData_: function() {
     this.clearingInProgress_ = true;
 
-    this.browserProxy_.clearBrowsingData().then(
-      /**
-       * @param {boolean} shouldShowNotice Whether we should show the notice
-       *     about other forms of browsing history before closing the dialog.
-       */
-      function(shouldShowNotice) {
-        this.clearingInProgress_ = false;
-        this.showHistoryDeletionDialog_ = shouldShowNotice;
+    this.browserProxy_.clearBrowsingData(this.importantSites_)
+        .then(
+            /**
+             * @param {boolean} shouldShowNotice Whether we should show the
+             * notice about other forms of browsing history before closing the
+             * dialog.
+             */
+            function(shouldShowNotice) {
+              this.clearingInProgress_ = false;
+              this.showHistoryDeletionDialog_ = shouldShowNotice;
 
-        if (!shouldShowNotice)
-          this.$.dialog.close();
-      }.bind(this));
+              if (!shouldShowNotice) {
+                this.closeDialogs_();
+              }

[Dan Beam, 2017/05/16 03:25:25]

nit: no curlies

[dullweber, 2017/05/16 11:08:49]

Done.

+            }.bind(this));
+  },
+
+  /**
+   * Closes the clear browsing data or important site dialog if they are open.
+   * @private
+   */
+  closeDialogs_: function() {
+    if (this.$.clearBrowsingDataDialog.open)
+      this.$.clearBrowsingDataDialog.close();
+    if (this.showImportantSitesDialog_)
+      this.$$('#importantSitesDialog').close();
   },
 
   /** @private */
   onCancelTap_: function() {
-    this.$.dialog.cancel();
+    this.$.clearBrowsingDataDialog.cancel();
   },
 
   /**
+   * Handles the tap confirm button in important sites.
+   * @private
+   */
+  onImportantSitesConfirmTap_: function() {
+    this.clearBrowsingData_();
+  },
+
+  /** @private */
+  onImportantSitesCancelTap_: function() {
+    this.$$('#importantSitesDialog').cancel();
+  },
+
+  /**
    * Handles the closing of the notice about other forms of browsing history.
    * @private
    */
   onHistoryDeletionDialogClose_: function() {
     this.showHistoryDeletionDialog_ = false;
-    this.$.dialog.close();
-  }
+    this.closeDialogs_();
+  },
 });