1 files changed, 67 insertions, 2 deletions
diff --git a/dom/xhr/XMLHttpRequestMainThread.cpp b/dom/xhr/XMLHttpRequestMainThread.cpp
index a47a01aa0..4fd34a993 100644
--- a/dom/xhr/XMLHttpRequestMainThread.cpp
+++ b/dom/xhr/XMLHttpRequestMainThread.cpp
@@ -1081,10 +1081,75 @@ XMLHttpRequestMainThread::CloseRequestWithError(const ProgressEventType aType)
 }
 
 void
-XMLHttpRequestMainThread::Abort(ErrorResult& arv)
+XMLHttpRequestMainThread::RequestErrorSteps(const ProgressEventType aEventType,
+                                            const nsresult aOptionalException,
+                                            ErrorResult& aRv)
+{
+  // Step 1
+  mState = State::done;
+
+  StopProgressEventTimer();
+
+  // Step 2
+  mFlagSend = false;
+
+  // Step 3
+  ResetResponse();
+
+  // If we're in the destructor, don't risk dispatching an event.
+  if (mFlagDeleted) {
+    mFlagSyncLooping = false;
+    return;
+  }
+
+  // Step 4
+  if (mFlagSynchronous && NS_FAILED(aOptionalException)) {
+    aRv.Throw(aOptionalException);
+    return;
+  }
+
+  // Step 5
+  FireReadystatechangeEvent();
+
+  // Step 6
+  if (mUpload && !mUploadComplete) {
+
+    // Step 6-1
+    mUploadComplete = true;
+
+    // Step 6-2
+    if (mFlagHadUploadListenersOnSend) {
+
+      // Steps 6-3, 6-4 (loadend is fired for us)
+      DispatchProgressEvent(mUpload, aEventType, 0, -1);
+    }
+  }
+
+  // Steps 7 and 8 (loadend is fired for us)
+  DispatchProgressEvent(this, aEventType, 0, -1);
+}
+
+void
+XMLHttpRequestMainThread::Abort(ErrorResult& aRv)
 {
   mFlagAborted = true;
-  CloseRequestWithError(ProgressEventType::abort);
+
+  // Step 1
+  CloseRequest();
+
+  // Step 2
+  if ((mState == State::opened && mFlagSend) ||
+       mState == State::headers_received ||
+       mState == State::loading) {
+    RequestErrorSteps(ProgressEventType::abort, NS_OK, aRv);
+  }
+
+  // Step 3
+  if (mState == State::done) {
+    ChangeState(State::unsent, false); // no ReadystateChange event
+  }
+
+  mFlagSyncLooping = false;
 }
 
 NS_IMETHODIMP