Minor optimization in FrameSelection::setNonDirectionalSelectionIfNeeded().

Minor optimization in FrameSelection::setNonDirectionalSelectionIfNeeded().

We can avoid a second call to newSelection.visibleExtent() by maintaining a local
variable for the same.

A call to visibleExtent() further entails computing of VisiblePosition which can
be avoided the second time round.
This change also makes it similar to the handling of newSelection.visibleBase().

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=161602

[yosin_UTC9, 2013-11-08 01:16:07]

ACK

[eseidel, 2013-11-08 01:50:05]

lgtm

[commit-bot: I haz the power, 2013-11-08 01:50:27]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/a.bah@samsung.com/64323002/1

[commit-bot: I haz the power, 2013-11-08 03:06:36]

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

[commit-bot: I haz the power, 2013-11-08 05:48:57]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/a.bah@samsung.com/64323002/1

[commit-bot: I haz the power, 2013-11-08 06:52:20]

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

[commit-bot: I haz the power, 2013-11-08 08:32:18]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/a.bah@samsung.com/64323002/1

[commit-bot: I haz the power, 2013-11-08 09:34:14]

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

[commit-bot: I haz the power, 2013-11-08 09:58:58]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/a.bah@samsung.com/64323002/1

[commit-bot: I haz the power, 2013-11-08 10:03:37]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/a.bah@samsung.com/64323002/1

[commit-bot: I haz the power, 2013-11-08 10:16:52]

Change committed as 161602