[Layout API] Convert DragController to use Document::layoutViewItem()

[Layout API] Convert DragController to use Document::layoutViewItem()

There was one reference to Document::layoutView() (hitTest() method)
which is deprecated by the new layout API. I converted it to use
layoutViewItem() instead. No new API methods were required.

There are no functional changes.

BUG=499321
Committed: https://crrev.com/7e56f128ae40af011365924ecbc055473947dedf
Cr-Commit-Position: refs/heads/master@{#388613}

[pilgrim_google, 2016-04-20 21:31:33]

pilgrim@chromium.org changed reviewers:
+ eae@chromium.org, jsbell@chromium.org, leviw@chromium.org

[leviw_travelin_and_unemployed, 2016-04-20 21:53:36]

The CQ bit was checked by leviw@chromium.org

[leviw_travelin_and_unemployed, 2016-04-20 21:53:36]

lgtm

[commit-bot: I haz the power, 2016-04-20 21:54:07]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1908573003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1908573003/1

[commit-bot: I haz the power, 2016-04-21 00:08:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-22 19:28:06]

Description was changed from

==========
[Layout API] Convert DragController to use Document::layoutViewItem()

There was one reference to Document::layoutView() (hitTest() method)
which is deprecated by the new layout API. I converted it to use
layoutViewItem() instead. No new API methods were required.

There are no functional changes.

BUG=499321
==========

to

==========
[Layout API] Convert DragController to use Document::layoutViewItem()

There was one reference to Document::layoutView() (hitTest() method)
which is deprecated by the new layout API. I converted it to use
layoutViewItem() instead. No new API methods were required.

There are no functional changes.

BUG=499321

Committed: https://crrev.com/7e56f128ae40af011365924ecbc055473947dedf
Cr-Commit-Position: refs/heads/master@{#388613}
==========

[commit-bot: I haz the power, 2016-04-22 19:28:07]

Patchset 1 (id:??) landed as
https://crrev.com/7e56f128ae40af011365924ecbc055473947dedf
Cr-Commit-Position: refs/heads/master@{#388613}