downloading - How to stop Chrome from causing Download folder to reappear in gallery?

Wanting to exclude the Download from being scanned by the Gallery application, I do as required, and create a:

.nomedia

file in the Download folder. That correctly causes the Download folder to vanish from Gallery. And all is well.

But then

If I Save an image from Chrome, the Download folder reappears in Gallery. This coincides with Chrome adding a special file to the Download folder:

ic.bin

Deleting the ic.bin file does not cause the folder to disappear from Gallery. Deleting, and re-adding the .nomedia file to the Download folder does cause the Download folder to vanish from Gallery.

I could ask this a number of alternate ways:

• how do I really prevent a folder from being scanned by Gallery?


• how do I deny file creation permission of a file called ic.bin in the Download folder?


• how do I deny file creation permission of a file called ic.bin in any folder?


• how do I stop Chrome from creating an ic.bin file in the Download folder?


• how do I stop the Download folder from reappearing in Gallery?


• how do I prevent Chrome from causing the Download folder from reappearing in the Gallery?

What I'm really asking is, "How do I exclude a folder from the Gallery?", given that .nomedia doesn't always work.

Device: Nexus 4

Android version: 4.2.1