Bug 1599780, remove unused offline apps legacy actor. r=johannh

The one message it responds to is never sent since bug 1574480 removed it, and the one event it listens to only ends up adding the window to a manifest set which is no longer used for anything since bug 1579444 removed it, r=johannh

Differential Revision: https://phabricator.services.mozilla.com/D65322

--HG--
extra : moz-landing-system : lando

browser/actors/OfflineAppsChild.jsm

@@ -1,92 +0,0 @@
-/* vim: set ts=2 sw=2 sts=2 et tw=80: */
-/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
-/* 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/. */
-
-var EXPORTED_SYMBOLS = ["OfflineAppsChild"];
-
-const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");
-const { ActorChild } = ChromeUtils.import(
-  "resource://gre/modules/ActorChild.jsm"
-);
-
-class OfflineAppsChild extends ActorChild {
-  constructor(dispatcher) {
-    super(dispatcher);
-
-    this._docId = 0;
-    this._docIdMap = new Map();
-
-    this._docManifestSet = new Set();
-  }
-
-  registerWindow(aWindow) {
-    let manifestURI = this._getManifestURI(aWindow);
-    this._docManifestSet.add(manifestURI.spec);
-  }
-
-  handleEvent(event) {
-    if (event.type == "MozApplicationManifest") {
-      this.registerWindow(event.originalTarget.defaultView);
-    }
-  }
-
-  _getManifestURI(aWindow) {
-    if (!aWindow.document.documentElement) {
-      return null;
-    }
-
-    var attr = aWindow.document.documentElement.getAttribute("manifest");
-    if (!attr) {
-      return null;
-    }
-
-    try {
-      return Services.io.newURI(
-        attr,
-        aWindow.document.characterSet,
-        Services.io.newURI(aWindow.location.href)
-      );
-    } catch (e) {
-      return null;
-    }
-  }
-
-  _startFetching(aDocument) {
-    if (!aDocument.documentElement) {
-      return;
-    }
-
-    let manifestURI = this._getManifestURI(aDocument.defaultView);
-    if (!manifestURI) {
-      return;
-    }
-
-    var updateService = Cc[
-      "@mozilla.org/offlinecacheupdate-service;1"
-    ].getService(Ci.nsIOfflineCacheUpdateService);
-    updateService.scheduleUpdate(
-      manifestURI,
-      aDocument.documentURIObject,
-      aDocument.nodePrincipal,
-      aDocument.defaultView
-    );
-  }
-
-  receiveMessage(aMessage) {
-    if (aMessage.name == "OfflineApps:StartFetching") {
-      let doc = this._docIdMap.get(aMessage.data.docId);
-      doc = doc && doc.get();
-      if (doc) {
-        this._startFetching(doc);
-      }
-      this._docIdMap.delete(aMessage.data.docId);
-    }
-  }
-}
-
-OfflineAppsChild.prototype.QueryInterface = ChromeUtils.generateQI([
-  Ci.nsIObserver,
-  Ci.nsISupportsWeakReference,
-]);

browser/actors/moz.build

@@ -44,7 +44,6 @@ FINAL_TARGET_FILES.actors += [
     'LinkHandlerParent.jsm',
     'NetErrorChild.jsm',
     'NetErrorParent.jsm',
-    'OfflineAppsChild.jsm',
     'PageInfoChild.jsm',
     'PageStyleChild.jsm',
     'PageStyleParent.jsm',

browser/components/BrowserGlue.jsm

@@ -390,16 +390,6 @@ let LEGACY_ACTORS = {
     },
   },
 
-  OfflineApps: {
-    child: {
-      module: "resource:///actors/OfflineAppsChild.jsm",
-      events: {
-        MozApplicationManifest: {},
-      },
-      messages: ["OfflineApps:StartFetching"],
-    },
-  },
-
   URIFixup: {
     child: {
       module: "resource:///actors/URIFixupChild.jsm",