Don't allow loads to start in a docshell that's firing the unload event. Also

don't allow document.open of the document in that docshell.  Bug 371360,
r=biesi, sr=jst


git-svn-id: svn://10.0.0.236/trunk@228064 18797224-902f-48f8-a5cc-f745e15eee43

mozilla/docshell/base/nsWebShell.cpp

@@ -768,6 +768,11 @@ nsWebShell::OnLinkClick(nsIContent* aContent,
                         nsIInputStream* aHeadersDataStream)
 {
   NS_ASSERTION(NS_IsMainThread(), "wrong thread");
+
+  if (mFiredUnloadEvent) {
+    return NS_OK;
+  }
+  
   nsCOMPtr<nsIRunnable> ev =
       new OnLinkClickEvent(this, aContent, aURI, aTargetSpec,
                            aPostDataStream, aHeadersDataStream);
@@ -791,6 +796,10 @@ nsWebShell::OnLinkClickSync(nsIContent *aContent,
     *aRequest = nsnull;
   }
 
+  if (mFiredUnloadEvent) {
+    return NS_OK;
+  }
+
   {
     // defer to an external protocol handler if necessary...
     nsCOMPtr<nsIExternalProtocolService> extProtService = do_GetService(NS_EXTERNALPROTOCOLSERVICE_CONTRACTID);