Fix typo in a comment (bug 305292). r=darin, sr=bz.

netwerk/cache/public/nsICache.idl

@@ -141,8 +141,8 @@ interface nsICache
      *                         storage (ie. typically in system RAM).
      * STORE_ON_DISK         - Requires the cache entry to reside in persistent
      *                         storage (ie. typically on a system's hard disk).
-     * STORE_ON_DISK_AS_DISK - Requires the cache entry to reside in persistent
-     *                         storage, and in a specific file.
+     * STORE_ON_DISK_AS_FILE - Requires the cache entry to reside in persistent
+     *                         storage, and in a separate file.
      */
     const nsCacheStoragePolicy STORE_ANYWHERE        = 0;
     const nsCacheStoragePolicy STORE_IN_MEMORY       = 1;