Introduce composed tree version of isFirstPositionAfterTable()

Introduce composed tree version of isFirstPositionAfterTable()

This patch introduces composed tree version of |isFirstPositionAfterTable()|
by templatizing original |isFirstPositionAfterTable()| to work both DOM tree
position and composed tree position version for introducing composed tree
version of |VisibleSelection| class.

This patch is a preparation of making selection to handle granularity for web
component, http://crrev.com/1277863002

BUG=513568
TEST=n/a; no behavior changes

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201904

[yosin_UTC9, 2015-09-08 06:36:52]

yosin@chromium.org changed reviewers:
+ hajimehoshi@chromium.org, yoichio@chromium.org

[yosin_UTC9, 2015-09-08 06:37:06]

PTAL

[hajimehoshi, 2015-09-08 06:39:53]

lgtm

[yosin_UTC9, 2015-09-08 06:40:38]

The CQ bit was checked by yosin@chromium.org

[commit-bot: I haz the power, 2015-09-08 06:40:42]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1309963003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1309963003/1

[yoichio, 2015-09-08 06:48:59]

Change itself is good.
However, |isFirstPositionAfterTable| returns other than bool is too strange.
Could you rename it to something |getTableJustBefore| or something?

[yosin_UTC9, 2015-09-08 07:10:24]

On 2015/09/08 06:48:59, yoichio wrote:
> Change itself is good.
> However, |isFirstPositionAfterTable| returns other than bool is too strange.
> Could you rename it to something |getTableJustBefore| or something?

filed http://crbug.com/529156

[commit-bot: I haz the power, 2015-09-08 08:58:23]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=201904