Bug 1333898 - MessageChannel messaging sets .ports to null, r=qdot

devtools/server/tests/browser/browser_directorscript_actors.js

@@ -53,7 +53,7 @@ function* testDirectorScriptMessagePort(directorManager) {
       exports.attach = function ({port}) {
         port.onmessage = function (evt) {
           // echo messages
-          evt.source.postMessage(evt.data);
+          evt.target.postMessage(evt.data);
         };
       };
     }).toString() + ")();",

devtools/server/tests/mochitest/test_director.html

@@ -81,7 +81,7 @@ function runDirectorRegistryActorTest() {
       module.exports = function({port}) {
         port.onmessage = function(evt) {
           // echo messages
-          evt.source.postMessage(evt.data);
+          evt.target.postMessage(evt.data);
         };
       };
     }).toString() + ")();",

dom/messagechannel/MessagePort.cpp

@@ -139,13 +139,10 @@ private:
       return NS_ERROR_OUT_OF_MEMORY;
     }
 
-    Nullable<WindowProxyOrMessagePort> source;
-    source.SetValue().SetAsMessagePort() = mPort;
-
     event->InitMessageEvent(nullptr, NS_LITERAL_STRING("message"),
                             false /* non-bubbling */,
                             false /* cancelable */, value, EmptyString(),
-                            EmptyString(), source, ports);
+                            EmptyString(), nullptr, ports);
     event->SetTrusted(true);
 
     bool dummy;

testing/web-platform/meta/workers/postMessage_event_properties.htm.ini

@@ -1,6 +0,0 @@
-[postMessage_event_properties.htm]
-  type: testharness
-  [ postMessage(): MessageEvent properties ]
-    expected: FAIL
-    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=952139
-