1 files changed, 0 insertions, 100 deletions
diff --git a/browser/components/sessionstore/PageStyle.jsm b/browser/components/sessionstore/PageStyle.jsm
deleted file mode 100644
index 0424ef6b1..000000000
--- a/browser/components/sessionstore/PageStyle.jsm
+++ /dev/null
@@ -1,100 +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 = ["PageStyle"];
-
-const Ci = Components.interfaces;
-
-/**
- * The external API exported by this module.
- */
-this.PageStyle = Object.freeze({
-  collect: function (docShell, frameTree) {
-    return PageStyleInternal.collect(docShell, frameTree);
-  },
-
-  restoreTree: function (docShell, data) {
-    PageStyleInternal.restoreTree(docShell, data);
-  }
-});
-
-// Signifies that author style level is disabled for the page.
-const NO_STYLE = "_nostyle";
-
-var PageStyleInternal = {
-  /**
-   * Collects the selected style sheet sets for all reachable frames.
-   */
-  collect: function (docShell, frameTree) {
-    let result = frameTree.map(({document: doc}) => {
-      let style;
-
-      if (doc) {
-        // http://dev.w3.org/csswg/cssom/#persisting-the-selected-css-style-sheet-set
-        style = doc.selectedStyleSheetSet || doc.lastStyleSheetSet;
-      }
-
-      return style ? {pageStyle: style} : null;
-    });
-
-    let markupDocumentViewer =
-      docShell.contentViewer;
-
-    if (markupDocumentViewer.authorStyleDisabled) {
-      result = result || {};
-      result.disabled = true;
-    }
-
-    return result && Object.keys(result).length ? result : null;
-  },
-
-  /**
-   * Restores pageStyle data for the current frame hierarchy starting at the
-   * |docShell's| current DOMWindow using the given pageStyle |data|.
-   *
-   * Warning: If the current frame hierarchy doesn't match that of the given
-   * |data| object we will silently discard data for unreachable frames. We may
-   * as well assign page styles to the wrong frames if some were reordered or
-   * removed.
-   *
-   * @param docShell (nsIDocShell)
-   * @param data (object)
-   *        {
-   *          disabled: true, // when true, author styles will be disabled
-   *          pageStyle: "Dusk",
-   *          children: [
-   *            null,
-   *            {pageStyle: "Mozilla", children: [ ... ]}
-   *          ]
-   *        }
-   */
-  restoreTree: function (docShell, data) {
-    let disabled = data.disabled || false;
-    let markupDocumentViewer =
-      docShell.contentViewer;
-    markupDocumentViewer.authorStyleDisabled = disabled;
-
-    function restoreFrame(root, data) {
-      if (data.hasOwnProperty("pageStyle")) {
-        root.document.selectedStyleSheetSet = data.pageStyle;
-      }
-
-      if (!data.hasOwnProperty("children")) {
-        return;
-      }
-
-      let frames = root.frames;
-      data.children.forEach((child, index) => {
-        if (child && index < frames.length) {
-          restoreFrame(frames[index], child);
-        }
-      });
-    }
-
-    let ifreq = docShell.QueryInterface(Ci.nsIInterfaceRequestor);
-    restoreFrame(ifreq.getInterface(Ci.nsIDOMWindow), data);
-  }
-};