App list: Fixed rendering issues upon opening the window in RTL mode.

App list: Fixed rendering issues upon opening the window in RTL mode.

This fixes two related bugs, one in the classic and one in the
experimental launcher in right-to-left languages. The classic launcher
would display a blank page upon opening the window; the experimental
launcher would display the start page layered on top of the apps grid.

The root cause of both bugs is http://crbug.com/446407; this is a quick
fix for merging back to M40 where this regressed.

BUG=441962
BUG=446978
Committed: https://crrev.com/c4a4b2c0f631c25626b5c9a42ed569d4cd77143f
Cr-Commit-Position: refs/heads/master@{#310682}

[Matt Giuca, 2015-01-09 00:46:22]

mgiuca@chromium.org changed reviewers:
+ tapted@chromium.org

[Matt Giuca, 2015-01-09 00:46:23]

This fixes both http://crbug.com/446978 (classic) and http://crbug.com/441962
(experimental), by using the same work-around as calamity did in AppsGridView.

I will remove both of these workarounds after
https://codereview.chromium.org/819273003/ goes through.

[tapted, 2015-01-09 00:55:15]

Nice sleuthing! lgtm

[Matt Giuca, 2015-01-09 01:08:48]

The CQ bit was checked by mgiuca@chromium.org

[commit-bot: I haz the power, 2015-01-09 01:09:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/844883002/20001

[commit-bot: I haz the power, 2015-01-09 02:40:03]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-01-09 02:40:47]

Patchset 2 (id:??) landed as
https://crrev.com/c4a4b2c0f631c25626b5c9a42ed569d4cd77143f
Cr-Commit-Position: refs/heads/master@{#310682}