Optimize View::UpdateRootBounds

Optimize View::UpdateRootBounds

If a view has a ton of children (say > 5000) with the majority hidden
then we spend a lot of unecessary time in View::UpdateRootBounds on
every paint.

BUG=409126
TEST=none, see bug
R=luken@chromium.org

Committed: https://crrev.com/d173d9821f7823e2edb477a08bd3fa9f742ea9dc
Cr-Commit-Position: refs/heads/master@{#294878}

[tfarina, 2014-09-15 18:02:09]

https://codereview.chromium.org/566403002/diff/1/ui/views/view.cc
File ui/views/view.cc (right):

https://codereview.chromium.org/566403002/diff/1/ui/views/view.cc#newcode423
ui/views/view.cc:423: // We're never painted when hidden, so no need to be in
the BoudsTree.
s/BoudsTree/BoundsTree

[sky, 2014-09-15 18:07:51]

Done

[luken, 2014-09-15 18:59:56]

lgtm

[sky, 2014-09-15 19:06:17]

The CQ bit was checked by sky@chromium.org

[commit-bot: I haz the power, 2014-09-15 19:16:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/566403002/40001

[commit-bot: I haz the power, 2014-09-15 20:20:40]

Committed patchset #3 (id:40001) as 4eac4add1d840079d26aa61f6e2ff5e55fc6c2ca

[commit-bot: I haz the power, 2014-09-15 20:23:16]

Patchset 3 (id:??) landed as
https://crrev.com/d173d9821f7823e2edb477a08bd3fa9f742ea9dc
Cr-Commit-Position: refs/heads/master@{#294878}