Issue 3499 - Use the new messaging API for the issue reporter

lib/child/dataCollector.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 /**
  * @fileOverview Collects some data for a content window, to be attached to
  * issue reports.
  */
 
 "use strict";
 
 let {Services} = Cu.import("resource://gre/modules/Services.jsm", {});
 let {Task} = Cu.import("resource://gre/modules/Task.jsm", {});
 let {PrivateBrowsingUtils} = Cu.import("resource://gre/modules/PrivateBrowsingUtils.jsm", {});
 
+let {port} = require("messaging");
 let {Utils} = require("utils");
 
-addMessageListener("AdblockPlus:CollectData", onCollectData);
-onShutdown.add(() => {
-  removeMessageListener("AdblockPlus:CollectData", onCollectData);
-});
+port.on("collectData", onCollectData);
 
-function onCollectData(message)
+function onCollectData({outerWindowID, screenshotWidth}, sender)
 {
-  let {outerWindowID, screenshotWidth, responseID} = message.data;
-
-  function success(data)
-  {
-    sendAsyncMessage("AdblockPlus:CollectDataResponse", {
-      responseID,
-      data
-    });
-  }
-
-  function error(e)
-  {
-    Cu.reportError(e);
-    sendAsyncMessage("AdblockPlus:CollectDataResponse", {
-      responseID,
-      data: null
-    });
-  }
-
   let window = Services.wm.getOuterWindowWithId(outerWindowID);
   if (window)
   {
-    Task.spawn(function*()
+    return Task.spawn(function*()
     {
       let data = {};
       data.isPrivate = PrivateBrowsingUtils.isContentWindowPrivate(window);
       data.opener = window.opener ? window.opener.location.href : null;
       data.referrer = window.document.referrer;
       data.frames = yield scanFrames(window);
       data.screenshot = yield createScreenshot(window, screenshotWidth);
       return data;
-    }).then(success, error);
+    });
   }
 }
 
 function scanFrames(window)
 {
   let frames = [];
   for (let i = 0; i < window.frames.length; i++)
   {
     let frame = window.frames[i];
     frames.push({
@@ skipping 40 matching lines @@
 
     if (i % 5000 == 0)
     {
       // Take a break every 5000 bytes to prevent browser hangs
       yield new Promise((resolve, reject) => Utils.runAsync(resolve));
     }
   }
 
   return pixelData;
 }