326668 Add NS_NewLocalFileWithFSRef function to create nsLocalFiles from FSRefs on Mac prior to xpcom startup. r=josh sr=dougt

xpcom/io/nsILocalFileMac.idl

@@ -21,6 +21,7 @@
  *
  * Contributor(s):
  *  Conrad Carlen <ccarlen@netscape.com>
+ *  Mark Mentovai <mark@moxienet.com>
  *
  * Alternatively, the contents of this file may be used under the terms of
  * either the GNU General Public License Version 2 or later (the "GPL"), or
@@ -239,5 +240,8 @@ NS_EXPORT const char* NS_TruncNodeName(const char *aNode, char *outBuf);
 #endif
 
 NS_EXPORT nsresult NS_NewLocalFileWithFSSpec(const FSSpec* inSpec, PRBool followSymlinks, nsILocalFileMac* *result);
+
+// NS_NewLocalFileWithFSRef is available since Mozilla 1.8.1.
+NS_EXPORT nsresult NS_NewLocalFileWithFSRef(const FSRef* aFSRef, PRBool aFollowSymlinks, nsILocalFileMac** result);
 }
 %}

xpcom/io/nsLocalFileOSX.cpp

@@ -2123,6 +2123,24 @@ nsresult NS_NewLocalFileWithFSSpec(const FSSpec* inSpec, PRBool followLinks, nsI
     return NS_OK;
 }
 
+nsresult NS_NewLocalFileWithFSRef(const FSRef* aFSRef, PRBool aFollowLinks, nsILocalFileMac** result)
+{
+    nsLocalFile* file = new nsLocalFile();
+    if (file == nsnull)
+        return NS_ERROR_OUT_OF_MEMORY;
+    NS_ADDREF(file);
+
+    file->SetFollowLinks(aFollowLinks);
+
+    nsresult rv = file->InitWithFSRef(aFSRef);
+    if (NS_FAILED(rv)) {
+        NS_RELEASE(file);
+        return rv;
+    }
+    *result = file;
+    return NS_OK;
+}
+
 //*****************************************************************************
 //  Static Functions
 //*****************************************************************************