1 files changed, 0 insertions, 74 deletions
diff --git a/browser/components/sessionstore/TabAttributes.jsm b/browser/components/sessionstore/TabAttributes.jsm
deleted file mode 100644
index 8a29680f4..000000000
--- a/browser/components/sessionstore/TabAttributes.jsm
+++ /dev/null
@@ -1,74 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this file,
- * You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-"use strict";
-
-this.EXPORTED_SYMBOLS = ["TabAttributes"];
-
-// We never want to directly read or write these attributes.
-// 'image' should not be accessed directly but handled by using the
-//         gBrowser.getIcon()/setIcon() methods.
-// 'muted' should not be accessed directly but handled by using the
-//         tab.linkedBrowser.audioMuted/toggleMuteAudio methods.
-// 'pending' is used internal by sessionstore and managed accordingly.
-// 'iconLoadingPrincipal' is same as 'image' that it should be handled by
-//                        using the gBrowser.getIcon()/setIcon() methods.
-const ATTRIBUTES_TO_SKIP = new Set(["image", "muted", "pending", "iconLoadingPrincipal"]);
-
-// A set of tab attributes to persist. We will read a given list of tab
-// attributes when collecting tab data and will re-set those attributes when
-// the given tab data is restored to a new tab.
-this.TabAttributes = Object.freeze({
-  persist: function (name) {
-    return TabAttributesInternal.persist(name);
-  },
-
-  get: function (tab) {
-    return TabAttributesInternal.get(tab);
-  },
-
-  set: function (tab, data = {}) {
-    TabAttributesInternal.set(tab, data);
-  }
-});
-
-var TabAttributesInternal = {
-  _attrs: new Set(),
-
-  persist: function (name) {
-    if (this._attrs.has(name) || ATTRIBUTES_TO_SKIP.has(name)) {
-      return false;
-    }
-
-    this._attrs.add(name);
-    return true;
-  },
-
-  get: function (tab) {
-    let data = {};
-
-    for (let name of this._attrs) {
-      if (tab.hasAttribute(name)) {
-        data[name] = tab.getAttribute(name);
-      }
-    }
-
-    return data;
-  },
-
-  set: function (tab, data = {}) {
-    // Clear attributes.
-    for (let name of this._attrs) {
-      tab.removeAttribute(name);
-    }
-
-    // Set attributes.
-    for (let name in data) {
-      if (!ATTRIBUTES_TO_SKIP.has(name)) {
-        tab.setAttribute(name, data[name]);
-      }
-    }
-  }
-};
-