Move makeRange() with VisiblePosition to EditingUtilities.cpp from VisiblePosition.cpp

Move makeRange() with VisiblePosition to EditingUtilities.cpp from VisiblePosition.cpp

This patch moves |makeRange()| with |VisiblePosition| to "EditingUtilities.cpp"
from "VisiblePosition.cpp" to simplify "VisiblePosition.cpp" for improving code
health, since it doesn't depend of implementation of |VisiblePosition| class.

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

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201466

[yosin_UTC9, 2015-08-31 05:13:00]

Patchset #1 (id:1) has been deleted

[yosin_UTC9, 2015-08-31 05:42:15]

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

[yosin_UTC9, 2015-08-31 05:42:16]

PTAL

[hajimehoshi, 2015-08-31 05:46:49]

lgtm

[yosin_UTC9, 2015-08-31 05:47:19]

The CQ bit was checked by yosin@chromium.org

[commit-bot: I haz the power, 2015-08-31 05:47:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1320313002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1320313002/20001

[commit-bot: I haz the power, 2015-08-31 06:21:11]

Committed patchset #1 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=201466