Bug 1368204 - convert uses of 'defer' to 'new Promise' in client/responsive.html; r=tromey

MozReview-Commit-ID: HnjT6j9yjW3

--HG--
extra : rebase_source : 7c1eedaaec2b5f9ac05517a3a0e2210cdbd80002

devtools/client/responsive.html/browser/swap.js

@@ -5,7 +5,6 @@
 "use strict";
 
 const { Ci } = require("chrome");
-const promise = require("promise");
 const { Task } = require("devtools/shared/task");
 const { tunnelToInnerBrowser } = require("./tunnel");
 
@@ -329,19 +328,18 @@ function addXULBrowserDecorations(browser) {
 }
 
 function tabLoaded(tab) {
-  let deferred = promise.defer();
-
-  function handle(event) {
-    if (event.originalTarget != tab.linkedBrowser.contentDocument ||
-        event.target.location.href == "about:blank") {
-      return;
+  return new Promise(resolve => {
+    function handle(event) {
+      if (event.originalTarget != tab.linkedBrowser.contentDocument ||
+          event.target.location.href == "about:blank") {
+        return;
+      }
+      tab.linkedBrowser.removeEventListener("load", handle, true);
+      resolve(event);
     }
-    tab.linkedBrowser.removeEventListener("load", handle, true);
-    deferred.resolve(event);
-  }
 
-  tab.linkedBrowser.addEventListener("load", handle, true);
-  return deferred.promise;
+    tab.linkedBrowser.addEventListener("load", handle, true);
+  });
 }
 
 exports.swapToInnerBrowser = swapToInnerBrowser;

devtools/client/responsive.html/utils/e10s.js

@@ -4,8 +4,6 @@
 
 "use strict";
 
-const { defer } = require("promise");
-
 // The prefix used for RDM messages in content.
 // see: devtools/client/responsivedesign/responsivedesign-child.js
 const MESSAGE_PREFIX = "ResponsiveMode:";
@@ -52,14 +50,12 @@ exports.off = off;
  *    A promise that is resolved when the given message is emitted.
  */
 function once(mm, message) {
-  let { resolve, promise } = defer();
-
-  on(mm, message, function onMessage({data}) {
-    off(mm, message, onMessage);
-    resolve(data);
+  return new Promise(resolve => {
+    on(mm, message, function onMessage({data}) {
+      off(mm, message, onMessage);
+      resolve(data);
+    });
   });
-
-  return promise;
 }
 exports.once = once;
 

devtools/client/responsive.html/utils/message.js

@@ -4,23 +4,19 @@
 
 "use strict";
 
-const promise = require("promise");
-
 const REQUEST_DONE_SUFFIX = ":done";
 
 function wait(win, type) {
-  let deferred = promise.defer();
-
-  let onMessage = event => {
-    if (event.data.type !== type) {
-      return;
-    }
-    win.removeEventListener("message", onMessage);
-    deferred.resolve();
-  };
-  win.addEventListener("message", onMessage);
-
-  return deferred.promise;
+  return new Promise(resolve => {
+    let onMessage = event => {
+      if (event.data.type !== type) {
+        return;
+      }
+      win.removeEventListener("message", onMessage);
+      resolve();
+    };
+    win.addEventListener("message", onMessage);
+  });
 }
 
 /**