Merge "Fix webview crash on attempt to scroll."

Merge "Fix webview crash on attempt to scroll."

> This fixes crash of webview when its content is scrolled using
> 2-fingers gesture via touchpad or using touchscreen.
>
> BUG=615512
> TEST=Manually on device using Arc++ OptIn UI, ToS is scrolled
>      as expected using touchscreen or touchpad, no crashes.
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation
>
> Review-Url: https://codereview.chromium.org/2015373002
> Cr-Commit-Position: refs/heads/master@{#397901}
> (cherry picked from commit d92694016e4cc9f7812894aa60eb4d36de6cd381)

Committed: https://chromium.googlesource.com/chromium/src/+/72b35e91ce0b567bc4b337124c63d7d6359cce27

[xiyuan, 2016-06-07 16:59:54]

Description was changed from

==========
Merge "Fix webview crash on attempt to scroll."

> This fixes crash of webview when its content is scrolled using
> 2-fingers gesture via touchpad or using touchscreen.
>
> BUG=615512
> TEST=Manually on device using Arc++ OptIn UI, ToS is scrolled
>      as expected using touchscreen or touchpad, no crashes.
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation
>
> Review-Url: https://codereview.chromium.org/2015373002
> Cr-Commit-Position: refs/heads/master@{#397901}
> (cherry picked from commit d92694016e4cc9f7812894aa60eb4d36de6cd381)
==========

to

==========
Merge "Fix webview crash on attempt to scroll."

> This fixes crash of webview when its content is scrolled using
> 2-fingers gesture via touchpad or using touchscreen.
>
> BUG=615512
> TEST=Manually on device using Arc++ OptIn UI, ToS is scrolled
>      as expected using touchscreen or touchpad, no crashes.
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_site_isolation
>
> Review-Url: https://codereview.chromium.org/2015373002
> Cr-Commit-Position: refs/heads/master@{#397901}
> (cherry picked from commit d92694016e4cc9f7812894aa60eb4d36de6cd381)

Committed:
https://chromium.googlesource.com/chromium/src/+/72b35e91ce0b567bc4b337124c63...
==========

[xiyuan, 2016-06-07 16:59:57]

Committed patchset #1 (id:1) manually as
72b35e91ce0b567bc4b337124c63d7d6359cce27.