Make EditorCommand to use VisibleSelection::toNormalizedEphemeralRange() instead of toNormalizedRang

Make EditorCommand to use VisibleSelection::toNormalizedEphemeralRange() instead of toNormalizedRange()

This patch changes |EditorCOmmand| class to use |toNormalizedEphemeralRange()|
in |VisibleSelection| class instead of |toNormalizedRange()| as a preparation
of templatizing |VisibleSelection| to use templatized positions instead of
DOM position to represent range and avoid registering temporary |Range|
object into |Document|.

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

BUG=388681, 513568
TEST=n/a; no behavior changes

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=201127

[yosin_UTC9, 2015-08-25 07:03:58]

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

[yosin_UTC9, 2015-08-25 07:04:09]

PTAL

[yoichio, 2015-08-25 07:33:05]

lgtm

[yosin_UTC9, 2015-08-25 07:41:35]

The CQ bit was checked by yosin@chromium.org

[commit-bot: I haz the power, 2015-08-25 07:41:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1315813003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1315813003/1

[commit-bot: I haz the power, 2015-08-25 08:37:27]

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

[commit-bot: I haz the power, 2015-08-25 08:37:28]

Try jobs failed on following builders:
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[yosin_UTC9, 2015-08-25 09:21:17]

The CQ bit was checked by yosin@chromium.org

[commit-bot: I haz the power, 2015-08-25 09:21:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1315813003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1315813003/1

[commit-bot: I haz the power, 2015-08-25 10:23:35]

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

[commit-bot: I haz the power, 2015-08-25 10:23:36]

Try jobs failed on following builders:
  mac_chromium_rel_ng on tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)

[yosin, 2015-08-25 10:30:47]

The CQ bit was checked by yosin@google.com

[commit-bot: I haz the power, 2015-08-25 10:30:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1315813003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1315813003/1

[commit-bot: I haz the power, 2015-08-25 11:39:00]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=201127