[MD Bookmarks] Make shift-selection behave well with no anchor.

[MD Bookmarks] Make shift-selection behave well with no anchor.

This CL makes shift-selection use the old focused index as an anchor
which makes shift selecting with the keyboard on page load work as
expected.

BUG=692844
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2924673003
Cr-Commit-Position: refs/heads/master@{#477557}
Committed: https://chromium.googlesource.com/chromium/src/+/6dacd834a9f5bd10f3de9e4780b4d48064370f95

[calamity, 2017-06-06 08:09:56]

Description was changed from

==========
[MD Bookmarks] Make shift-selection behave well with no anchor.

This CL makes shift-selection use the old focused index as an anchor
which makes shift selecting with the keyboard on page load work as
expected.

BUG=692844
==========

to

==========
[MD Bookmarks] Make shift-selection behave well with no anchor.

This CL makes shift-selection use the old focused index as an anchor
which makes shift selecting with the keyboard on page load work as
expected.

BUG=692844
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
==========

[calamity, 2017-06-06 08:10:58]

calamity@chromium.org changed reviewers:
+ tsergeant@chromium.org

[tsergeant, 2017-06-07 01:02:06]

lgtm

[calamity, 2017-06-07 03:57:50]

The CQ bit was checked by calamity@chromium.org

[commit-bot: I haz the power, 2017-06-07 03:58:09]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-06-07 05:42:01]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1496807870200410, "parent_rev":
"76cc70a314ba7ae045745fd5117b98d1a5c200da", "commit_rev":
"6dacd834a9f5bd10f3de9e4780b4d48064370f95"}

[commit-bot: I haz the power, 2017-06-07 05:42:12]

Description was changed from

==========
[MD Bookmarks] Make shift-selection behave well with no anchor.

This CL makes shift-selection use the old focused index as an anchor
which makes shift selecting with the keyboard on page load work as
expected.

BUG=692844
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
==========

to

==========
[MD Bookmarks] Make shift-selection behave well with no anchor.

This CL makes shift-selection use the old focused index as an anchor
which makes shift selecting with the keyboard on page load work as
expected.

BUG=692844
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2924673003
Cr-Commit-Position: refs/heads/master@{#477557}
Committed:
https://chromium.googlesource.com/chromium/src/+/6dacd834a9f5bd10f3de9e4780b4...
==========

[commit-bot: I haz the power, 2017-06-07 05:42:14]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/6dacd834a9f5bd10f3de9e4780b4...