Revert of Linux: Support the --class argument

Revert of Linux: Support the --class argument (patchset #4 id:60001 of https://codereview.chromium.org/2186813002/ )

Reason for revert:
Change breaks compile on Linux x64: https://build.chromium.org/p/chromium.chrome/builders/Google%20Chrome%20Linux%20x64/builds/12770

Original issue's description:
> Linux: Support the --class argument
>
> It appears we lost support for --class when we stopped using gtk for our
> windowing.  This CL adds that feature back.
>
> BUG=118613
>
> Committed: https://crrev.com/b4a38edc75149162fcbdf01e42d5411cf8e72520
> Cr-Commit-Position: refs/heads/master@{#408709}

TBR=thestig@chromium.org,benwells@chromium.org,thomasanderson@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=118613
Committed: https://crrev.com/1019dd83f1b3c419a26ac681789e2d6da5d8e868
Cr-Commit-Position: refs/heads/master@{#408733}

[pavely, 2016-07-29 19:55:35]

The CQ bit was checked by pavely@chromium.org

[pavely, 2016-07-29 19:55:36]

Created Revert of Linux: Support the --class argument

[commit-bot: I haz the power, 2016-07-29 19:56:12]

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, 2016-07-29 19:56:56]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-29 19:58:55]

Description was changed from

==========
Revert of Linux: Support the --class argument (patchset #4 id:60001 of
https://codereview.chromium.org/2186813002/ )

Reason for revert:
Change breaks compile on Linux x64:
https://build.chromium.org/p/chromium.chrome/builders/Google%20Chrome%20Linux...

Original issue's description:
> Linux: Support the --class argument
> 
> It appears we lost support for --class when we stopped using gtk for our
> windowing.  This CL adds that feature back.
> 
> BUG=118613
> 
> Committed: https://crrev.com/b4a38edc75149162fcbdf01e42d5411cf8e72520
> Cr-Commit-Position: refs/heads/master@{#408709}

TBR=thestig@chromium.org,benwells@chromium.org,thomasanderson@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=118613
==========

to

==========
Revert of Linux: Support the --class argument (patchset #4 id:60001 of
https://codereview.chromium.org/2186813002/ )

Reason for revert:
Change breaks compile on Linux x64:
https://build.chromium.org/p/chromium.chrome/builders/Google%20Chrome%20Linux...

Original issue's description:
> Linux: Support the --class argument
>
> It appears we lost support for --class when we stopped using gtk for our
> windowing.  This CL adds that feature back.
>
> BUG=118613
>
> Committed: https://crrev.com/b4a38edc75149162fcbdf01e42d5411cf8e72520
> Cr-Commit-Position: refs/heads/master@{#408709}

TBR=thestig@chromium.org,benwells@chromium.org,thomasanderson@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=118613

Committed: https://crrev.com/1019dd83f1b3c419a26ac681789e2d6da5d8e868
Cr-Commit-Position: refs/heads/master@{#408733}
==========

[commit-bot: I haz the power, 2016-07-29 19:58:56]

Patchset 1 (id:??) landed as
https://crrev.com/1019dd83f1b3c419a26ac681789e2d6da5d8e868
Cr-Commit-Position: refs/heads/master@{#408733}

[Lei Zhang, 2016-07-29 20:37:23]

lgtm

https://codereview.chromium.org/2193393002/diff/1/chrome/browser/ui/libgtk2ui...
File chrome/browser/ui/libgtk2ui/gtk2_util.cc (left):

https://codereview.chromium.org/2193393002/diff/1/chrome/browser/ui/libgtk2ui...
chrome/browser/ui/libgtk2ui/gtk2_util.cc:64: version_info::Channel
product_channel(chrome::GetChannel());
IWYU @_@