Get rid of unused member function toNormalizedRange() from FrameSelection and VisibleSelection class

Get rid of unused member function toNormalizedRange() from FrameSelection and VisibleSelection classes

This patch gets rid of unused member function |toNormalizedRange()| from
|FrameSelection| and |VisibleSelection| classes with re-formatting an associated
comment for improving code health.

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

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201206

[yosin_UTC9, 2015-08-26 02:18:31]

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

[yosin_UTC9, 2015-08-26 02:18:42]

PTAL

[yoichio, 2015-08-26 03:10:28]

lgtm

[yosin_UTC9, 2015-08-26 03:20:25]

The CQ bit was checked by yosin@chromium.org

[commit-bot: I haz the power, 2015-08-26 03:20:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1315513005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1315513005/1

[commit-bot: I haz the power, 2015-08-26 04:47:42]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-08-26 04:47:42]

Try jobs failed on following builders:
  linux_chromium_asan_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[yosin_UTC9, 2015-08-26 05:12:45]

The CQ bit was checked by yosin@chromium.org

[commit-bot: I haz the power, 2015-08-26 05:12:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1315513005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1315513005/1

[commit-bot: I haz the power, 2015-08-26 06:46:12]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=201206