fixup! TB 7494: Create local home page for TBB.

This reverts commit 2780d106.

browser/components/abouttor/content/aboutTor.js

@@ -182,21 +182,6 @@ const SurveyArea = {
    */
   _version: 1,
 
-  /**
-   * The latest version of the survey the user has dismissed.
-   * If higher or equal than _version, the survey will not be displayed.
-   *
-   * @type {integer}
-   */
-  _dismissVersion: 0,
-
-  /**
-   * The surveys will be shown only in the stable channel of Tor Browser.
-   *
-   * @type {boolean}
-   */
-  _isStable: false,
-
   /**
    * The date to start showing the survey.
    *
@@ -308,13 +293,6 @@ const SurveyArea = {
     },
   ],
 
-  /**
-   * The observer to update the localized content whenever the language changes.
-   *
-   * @type {MutationObserver}
-   */
-  _langObserver: null,
-
   /**
    * Initialize the survey area.
    */
@@ -333,17 +311,6 @@ const SurveyArea = {
     document.getElementById("survey-dismiss").addEventListener("click", () => {
       this._hide();
     });
-    this._langObserver = new MutationObserver(mutationList => {
-      for (const mutation of mutationList) {
-        if (
-          mutation.type === "attributes" &&
-          mutation.attributeName === "lang"
-        ) {
-          this.potentiallyShow();
-        }
-      }
-    });
-    this._langObserver.observe(document.documentElement, { attributes: true });
   },
 
   /**
@@ -366,33 +333,23 @@ const SurveyArea = {
   },
 
   /**
-   * Set the data for the survey.
+   * Decide whether to show the survey.
    *
    * @param {integer} dismissVersion - The latest version of survey that the
    *   user has already dismissed.
    * @param {boolean} isStable - Whether this is the stable release of Tor
    *   Browser.
    */
-  setData(dismissVersion, isStable) {
-    this._isStable = isStable;
-    this._dismissVersion = dismissVersion;
-    this.potentiallyShow();
-  },
-
-  /**
-   * Decide whether to show or update the survey.
-   */
-  potentiallyShow() {
+  potentiallyShow(dismissVersion, isStable) {
     const now = Date.now();
     if (
       now < this._startDate ||
       now >= this._endDate ||
       // The user has already dismissed this version of the survey before:
-      this._dismissVersion >= this._version ||
-      !this._isStable
+      dismissVersion >= this._version ||
+      !isStable
     ) {
       // Don't show the survey.
-      document.body.classList.remove("show-survey");
       return;
     }
 
@@ -401,7 +358,6 @@ const SurveyArea = {
     // Instead we only translate the banner into a limited set of locales that
     // match the languages that the survey itself supports. This should match
     // the language of the survey when it is opened by the user.
-    this._localeData = this._localeDataSet[0];
     const pageLocale = document.documentElement.getAttribute("lang");
     for (const localeData of this._localeDataSet) {
       if (localeData.browserLocales.includes(pageLocale)) {
@@ -409,6 +365,10 @@ const SurveyArea = {
         break;
       }
     }
+    if (!this._localeData) {
+      // Show the default en-US banner.
+      this._localeData = this._localeDataSet[0];
+    }
 
     // Make sure the survey's lang and dir attributes match the chosen locale.
     const surveyEl = document.getElementById("survey");
@@ -443,5 +403,5 @@ window.addEventListener("InitialData", event => {
   } = event.detail;
   SearchWidget.setOnionizeState(!!searchOnionize);
   MessageArea.setMessageData(messageData, !!isStable, !!torConnectEnabled);
-  SurveyArea.setData(surveyDismissVersion, isStable);
+  SurveyArea.potentiallyShow(surveyDismissVersion, isStable);
 });