Shrink space required by history log file

ui/file_manager/file_manager/foreground/js/file_manager.js

Index: ui/file_manager/file_manager/foreground/js/file_manager.js
diff --git a/ui/file_manager/file_manager/foreground/js/file_manager.js b/ui/file_manager/file_manager/foreground/js/file_manager.js
index a5de1582b9979887c41fe4d562778a8c4616e294..56320d4209c82244bebe0390c358f38cf9b1238f 100644
--- a/ui/file_manager/file_manager/foreground/js/file_manager.js
+++ b/ui/file_manager/file_manager/foreground/js/file_manager.js
@@ -807,6 +807,10 @@ FileManager.prototype = /** @struct */ {
   FileManager.prototype.onHistoryChanged_ = function(event) {
     this.tracker_.send(metrics.ImportEvents.HISTORY_CHANGED);
 
+    if (!event.entry) {

[mtomasz, 2015/02/25 00:40:17]

nit: Can we add a comment when can it happen that entry is not passed?

[Steve McKay, 2015/02/25 01:51:56]

Actually it should never be null. I might have added this when investigating
other issues. If we see problems in the future, we'll revisit adding
protections. For now, reverted.

+      return;
+    }
+
     // Ignore any entry that isn't an immediate child of the
     // current directory.
     util.isChildEntry(event.entry, this.getCurrentDirectoryEntry())