Issue #2159549 by Dave Reid: File_save() and file_delete() do not clear entity controller cache.

CHANGELOG.txt

@@ -1,6 +1,8 @@
 
 Drupal 7.28, xxxx-xx-xx (development version)
 -----------------------
+- Fixed a bug which caused caches not to be properly cleared when a file entity
+  was saved or deleted.
 - Added several missing countries to the default list returned by
   country_get_list() (string change).
 - Replaced the term "weight" with "influence" in the content ranking settings

includes/file.inc

@@ -621,7 +621,11 @@ function file_save(stdClass $file) {
     module_invoke_all('entity_update', $file, 'file');
   }
 
+  // Clear internal properties.
   unset($file->original);
+  // Clear the static loading cache.
+  entity_get_controller('file')->resetCache(array($file->fid));
+
   return $file;
 }
 
@@ -1293,6 +1297,7 @@ function file_delete(stdClass $file, $force = FALSE) {
   if (file_unmanaged_delete($file->uri)) {
     db_delete('file_managed')->condition('fid', $file->fid)->execute();
     db_delete('file_usage')->condition('fid', $file->fid)->execute();
+    entity_get_controller('file')->resetCache();
     return TRUE;
   }
   return FALSE;