cros: Preload external extension icons.

cros: Preload external extension icons.

Preload external extensions (aka default apps) icons so that they are available
when adding to launcher. This improves user experience on first time signing
into a ChromeOS device where external extension installation might stall the
icon loading and causing long delay before proper icon showing up.

BUG=146114
TEST=Verify app icons show up without delay on launcher bar.

R=aa@chromium.org

[xiyuan, 2012-10-05 18:33:35]

+mek

[Aaron Boodman, 2012-10-08 02:23:51]

How does it work in the normal startup case? (Why is it faster then?)

[xiyuan, 2012-10-08 16:55:40]

On 2012/10/08 02:23:51, Aaron Boodman wrote:
> How does it work in the normal startup case? (Why is it faster then?)

It only helps with the first time login where the external extensions (default
apps on ChromeOS) is unpacked and installed. From the 2nd login and on, we don't
have the problem (as in http://crbug.com/146114) because external extensions are
already installed in user's profile and disk is not busy.

[Aaron Boodman, 2012-10-24 22:06:40]

Should I still be reviewing this, or has it been abandoned?

[xiyuan, 2012-10-24 22:10:43]

On 2012/10/24 22:06:40, Aaron Boodman wrote:
> Should I still be reviewing this, or has it been abandoned?

Let me close this. It seems moving to blocking pool solves most of the problem
for 146114. (I have not yet able to verify the bug on arm device yet and will
close the bug once I get my hand on such a device.)