Adjust elision of omnibox keyword search label.

Adjust elision of omnibox keyword search label.

The search label will be limited to 50% of the omnibox width.
The minimum width will be just the search icon, although it's unlikely that
the omnibox will ever be that small on most platforms.

See bug for extended discussion.

BUG=694152
Review-Url: https://codereview.chromium.org/2731113002
Cr-Commit-Position: refs/heads/master@{#457255}
(cherry picked from commit cdedb4788d9ead1bdb685cfa1e765ae15fcd7ea9)

Review-Url: https://codereview.chromium.org/2748103013 .
Cr-Commit-Position: refs/branch-heads/3029@{#262}
Cr-Branched-From: 939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed: https://chromium.googlesource.com/chromium/src/+/fc437f4143b27bb3fb511a7d20d88188c5fd1f57

[Evan Stade, 2017-03-17 14:49:48]

Description was changed from

==========
Adjust elision of omnibox keyword search label.

The search label will be limited to 50% of the omnibox width.
The minimum width will be just the search icon, although it's unlikely that
the omnibox will ever be that small on most platforms.

See bug for extended discussion.

BUG=694152

Review-Url: https://codereview.chromium.org/2731113002
Cr-Commit-Position: refs/heads/master@{#457255}
(cherry picked from commit cdedb4788d9ead1bdb685cfa1e765ae15fcd7ea9)
==========

to

==========
Adjust elision of omnibox keyword search label.

The search label will be limited to 50% of the omnibox width.
The minimum width will be just the search icon, although it's unlikely that
the omnibox will ever be that small on most platforms.

See bug for extended discussion.

BUG=694152

Review-Url: https://codereview.chromium.org/2731113002
Cr-Commit-Position: refs/heads/master@{#457255}
(cherry picked from commit cdedb4788d9ead1bdb685cfa1e765ae15fcd7ea9)

Review-Url: https://codereview.chromium.org/2748103013 .
Cr-Commit-Position: refs/branch-heads/3029@{#262}
Cr-Branched-From:
939b32ee5ba05c396eef3fd992822fcca9a2e262-refs/heads/master@{#454471}
Committed:
https://chromium.googlesource.com/chromium/src/+/fc437f4143b27bb3fb511a7d20d8...
==========

[Evan Stade, 2017-03-17 14:49:49]

Committed patchset #1 (id:1) manually as
fc437f4143b27bb3fb511a7d20d88188c5fd1f57.