Fix for bug 164190. nsSafeSaveFile mistreats nsLocalFile, deleting files under one. Patch by sfraser, r=ccarlen, sr=alecf.

modules/libpref/src/nsSafeSaveFile.cpp

@@ -110,15 +110,10 @@ nsresult nsSafeSaveFile::CreateBackup(PurgeBackupType aPurgeType)
             return rv;
     }
 
-    // Ugh, copy only takes a directory and a name, lets "unpackage" our target file...
-    rv = mBackupFile->GetParent(getter_AddRefs(backupParent));
-    if (NS_FAILED(rv))
-        return rv;
-
     // and finally, copy the file (preserves file permissions)
     rv2 = NS_OK;
     do {
-        rv = mTargetFile->CopyToNative(backupParent, mBackupFileName);
+        rv = mTargetFile->CopyToNative(nsnull, mBackupFileName);
         if (NS_SUCCEEDED(rv))
             break;