Only start action mode if there is a selection

Only start action mode if there is a selection

It currently doesn't make sense to have an action mode without a selection. The main
way to close the action mode is through |SELECTION_HANDLES_CLEARED| and that is not
possible in this situation since there was no selection to begin with.

BUG=715268
Review-Url: https://codereview.chromium.org/2836843006
Cr-Commit-Position: refs/heads/master@{#467186}
(cherry picked from commit ae9712079d2b34e4a543a8f04de581a3b7bfd383)

Review-Url: https://codereview.chromium.org/2842063003 .
Cr-Commit-Position: refs/branch-heads/3071@{#216}
Cr-Branched-From: a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed: https://chromium.googlesource.com/chromium/src/+/b601128af8413ee77c17735df8a2475118d5bce2

[aelias_OOO_until_Jul13, 2017-04-26 01:20:01]

Description was changed from

==========
Only start action mode if there is a selection

It currently doesn't make sense to have an action mode without a selection. The
main
way to close the action mode is through |SELECTION_HANDLES_CLEARED| and that is
not
possible in this situation since there was no selection to begin with.

BUG=715268

Review-Url: https://codereview.chromium.org/2836843006
Cr-Commit-Position: refs/heads/master@{#467186}
(cherry picked from commit ae9712079d2b34e4a543a8f04de581a3b7bfd383)
==========

to

==========
Only start action mode if there is a selection

It currently doesn't make sense to have an action mode without a selection. The
main
way to close the action mode is through |SELECTION_HANDLES_CLEARED| and that is
not
possible in this situation since there was no selection to begin with.

BUG=715268

Review-Url: https://codereview.chromium.org/2836843006
Cr-Commit-Position: refs/heads/master@{#467186}
(cherry picked from commit ae9712079d2b34e4a543a8f04de581a3b7bfd383)

Review-Url: https://codereview.chromium.org/2842063003 .
Cr-Commit-Position: refs/branch-heads/3071@{#216}
Cr-Branched-From:
a106f0abbf69dad349d4aaf4bcc4f5d376dd2377-refs/heads/master@{#464641}
Committed:
https://chromium.googlesource.com/chromium/src/+/b601128af8413ee77c17735df8a2...
==========

[aelias_OOO_until_Jul13, 2017-04-26 01:20:03]

Committed patchset #1 (id:1) manually as
b601128af8413ee77c17735df8a2475118d5bce2.