Warm-up the App List when enabled from the webstore and not shown.

Warm-up the App List when enabled from the webstore and not shown.

On Mac, the app list is not warmed up when Chrome starts. If it is not
shown, its model will not be updated with the changes due to app
install. If shown, the app is not shown at all if it is still
installing, and it will not be highlighted if shown after install
completes.

This CL Exposes a CreateForProfile function to the AppListService, which
allows an app list to be created but not shown.

BUG=267814
TEST=From a profile that has not used the app launcher (it can have
apps), install an app from the web store. Launch the app launcher.
During install, it should show install progress. After install, it
should have the item highlighted (whether first shown before or after
install completes).
TBR=xiyuan@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=216954

[tapted, 2013-08-09 06:40:47]

koz, PTAL. I had traced this with debug statements in the earlier CL, but I
couldn't test it end-to-end until the webstore update was deployed.. looks like
I missed a bit, even though my tracing told me the model started highlighted
when initially set on the view. Apparently not - poop.

[tapted, 2013-08-09 06:42:27]

+chrome-apps-syd-reviews

You can see my first attempt in Patch Set 1, which simply made the "suppress
show on first install" a Windows-only thing. However, it didn't work -- there is
too much "stuff" going on during the enable which causes the app list to lose
focus and disappear.

[tapted, 2013-08-09 07:54:21]

btw - patched this in on Windows & double checked, both:
 - ./chrome.exe --disable-app-list && enable via webstore in same profile
 - ./chrome.exe --disable-app-list && enable via webstore in a different profile
(i.e. after warm-up in "other" profile)

all good!

[koz (OOO until 15th September), 2013-08-12 00:08:55]

Cool! lgtm

[commit-bot: I haz the power, 2013-08-12 04:43:51]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tapted@chromium.org/22730003/17001

[commit-bot: I haz the power, 2013-08-12 05:02:02]

Retried try job too often on chromium_presubmit for step(s) presubmit
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=chromium_p...

[tapted, 2013-08-12 05:53:58]

TBR xiyuan for mechanical change in
    chrome/browser/ui/ash/app_list/app_list_service_ash.cc

[commit-bot: I haz the power, 2013-08-12 05:54:22]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tapted@chromium.org/22730003/17001

[commit-bot: I haz the power, 2013-08-12 07:44:44]

Change committed as 216954