Remove "bashism" from plain shell script

Remove "bashism" from plain shell script

https://codereview.chromium.org/196413021 uses [[ which isn't present
in all shells, particularly not dash which Debian uses as /bin/sh.
Instead use two simple [ conditions.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=258321

[davve, 2014-03-19 08:39:16]

I guess the question is if Chromium supports other shells than bash as /bin/sh.
If so, this might be a way to go. Another alternative is to set the script to be
a /bin/bash script instead. What do you think?

[Ami GONE FROM CHROMIUM, 2014-03-19 18:24:58]

My $0.02: #!/bin/bash and done.

[szager1, 2014-03-19 19:17:17]

On 2014/03/19 18:24:58, Ami Fischman wrote:
> My $0.02: #!/bin/bash and done.

My heart agrees, but we've been down this road before, and decided that it
wasn't so horrible to use strict bourne shell syntax.

[szager1, 2014-03-19 19:17:29]

lgtm

[davve, 2014-03-20 07:38:36]

The CQ bit was checked by davve@opera.com

[commit-bot: I haz the power, 2014-03-20 07:38:44]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/davve@opera.com/203463010/1

[commit-bot: I haz the power, 2014-03-20 07:40:12]

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

[commit-bot: I haz the power, 2014-03-20 07:40:13]

Try jobs failed on following builders:
  tryserver.chromium on linux_chromium_clang_dbg

[davve, 2014-03-20 13:50:26]

The CQ bit was checked by davve@opera.com

[commit-bot: I haz the power, 2014-03-20 13:50:35]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/davve@opera.com/203463010/1

[commit-bot: I haz the power, 2014-03-20 17:33:44]

Change committed as 258321