diff --git a/mozilla/editor/composer/src/nsEditorShell.cpp b/mozilla/editor/composer/src/nsEditorShell.cpp
index a23ffd50196..ceb8d4d7c28 100644
--- a/mozilla/editor/composer/src/nsEditorShell.cpp
+++ b/mozilla/editor/composer/src/nsEditorShell.cpp
@@ -1603,73 +1603,6 @@ nsEditorShell::TransferDocumentStateListeners()
   return NS_OK;
 }
 
-// this method should move into JS
-NS_IMETHODIMP
-nsEditorShell::CheckOpenWindowForURLMatch(const PRUnichar* inFileURL, nsIDOMWindowInternal* inCheckWindow, PRBool *aDidFind)
-{
-  NS_ENSURE_ARG_POINTER((inCheckWindow && aDidFind));
-  
-  *aDidFind = PR_FALSE;
-  
-  nsresult rv;
-  nsAutoString fileurlstring(inFileURL);
-  nsCOMPtr<nsIURI> newFileLocation;
-  rv = NS_NewURI(getter_AddRefs(newFileLocation), fileurlstring);
-  if (NS_FAILED(rv)) return rv;
-
-  nsCOMPtr<nsIDOMWindow> contentWindow;
-  inCheckWindow->GetContent(getter_AddRefs(contentWindow));
-  if (!contentWindow) return NS_ERROR_NULL_POINTER;
-
-  // get the content doc
-  nsCOMPtr<nsIDOMDocument> contentDoc;          
-  contentWindow->GetDocument(getter_AddRefs(contentDoc));
-
-  // use the contentDoc to get the document's URI
-  nsCOMPtr<nsIURI> docURI;
-  rv = GetDocumentURI(contentDoc, getter_AddRefs(docURI));
-  if (rv == NS_ERROR_NOT_INITIALIZED) return NS_OK; // editing about:blank so no uri yet
-  if (NS_FAILED(rv) || !docURI) return NS_ERROR_NULL_POINTER;
-
-  // this does a simple string compare but isn't really checking for aliases
-  // or ".." in path which might actually cause this method to fail to match
-  // even though the same file is being edited
-  PRBool isSameFile;          
-  if (NS_SUCCEEDED(docURI->Equals(newFileLocation, &isSameFile)) && isSameFile)
-  {
-    *aDidFind = PR_TRUE;
-  }
-  else 
-  {
-    // do the schemes match?  if not, these are not matches
-    // check file: protocol first
-    PRBool doContinueChecking = PR_TRUE;
-    nsCOMPtr<nsIFileURL> currentProtocolFile(do_QueryInterface(docURI));
-    if (currentProtocolFile)
-    {
-      nsCOMPtr<nsIFileURL> newProtocolFile(do_QueryInterface(newFileLocation));
-      if (!newProtocolFile)
-      {
-        *aDidFind = PR_FALSE;
-        doContinueChecking = PR_FALSE;
-      }
-      else if (NS_SUCCEEDED(currentProtocolFile->Equals(newProtocolFile, &isSameFile)) && isSameFile)
-      {
-        *aDidFind = PR_TRUE;
-        doContinueChecking = PR_FALSE;
-      }
-    }
-    
-    // check http urls... then ftp, then maybe even https... any others?
-    if (doContinueChecking)
-    {
-      // this is covered by bug #104908
-    }
-  }
-
-  return NS_OK;
-}
-
 nsresult
 nsEditorShell::GetDocumentURI(nsIDOMDocument *aDoc, nsIURI **aDocumentURI)
 {
diff --git a/mozilla/editor/idl/nsIEditorShell.idl b/mozilla/editor/idl/nsIEditorShell.idl
index 9d94fef1ea8..37d3cd209aa 100644
--- a/mozilla/editor/idl/nsIEditorShell.idl
+++ b/mozilla/editor/idl/nsIEditorShell.idl
@@ -133,9 +133,6 @@ interface nsIEditorShell : nsISupports
   */
   void Shutdown();
                         
-  /* check a particular window's URL to see if it matches the given URL */
-  boolean checkOpenWindowForURLMatch( in wstring inFileURL, in nsIDOMWindowInternal inCheckWindow); 
-
   /* Commands */
   void Print();