XHR: reset error flag on aborting request that restarts.

Source/core/xml/XMLHttpRequest.cpp

Index: Source/core/xml/XMLHttpRequest.cpp
diff --git a/Source/core/xml/XMLHttpRequest.cpp b/Source/core/xml/XMLHttpRequest.cpp
index ab18af4786f9845c70b2730c6e745a7819f5c7ef..1adb1717bea29df055e83a4e52c17d95bdeeae66 100644
--- a/Source/core/xml/XMLHttpRequest.cpp
+++ b/Source/core/xml/XMLHttpRequest.cpp
@@ -914,6 +914,12 @@ bool XMLHttpRequest::internalAbort(DropProtection async)
     // Save to a local variable since we're going to drop protection.
     bool newLoadStarted = m_loader;
 
+    // If abort() called internalAbort() and a nested open() ended up
+    // clearing the error flag, but didn't send(), make sure the error
+    // flag is still set.
+    if (!newLoadStarted)
+        m_error = true;
+
     if (async == DropProtectionAsync)
         dropProtectionSoon();
     else