Revert of Roll third_party/custom_tabs_client

Revert of Roll third_party/custom_tabs_client (patchset #1 id:1 of https://codereview.chromium.org/1254383014/)

Reason for revert:
speculative revert, prevents clank roll downstream, see crbug.com/515457

Original issue's description:
> Roll third_party/custom_tabs_client
>
> Roll from 6bae8bf337d5c51184c0c01f5baca3e0858 to
> 19d5cb35bece11876e8f34c17c6fdfd9bad.
>
> BUG=510083
>
> Committed: https://crrev.com/dc731ce3111a8d4f316e478601707cc33e70e542
> Cr-Commit-Position: refs/heads/master@{#341048}

TBR=yusufo@chromium.org,ianwen@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=510083
Committed: https://crrev.com/66d3e303ded89c565e8fb33d8000044cdcf2b8c1
Cr-Commit-Position: refs/heads/master@{#341100}

Committed: https://crrev.com/2437a647519eaa88abb281af73d3243a3d7a97e4
Cr-Commit-Position: refs/heads/master@{#341108}

[timvolodine, 2015-07-30 11:54:35]

Created Revert of Roll third_party/custom_tabs_client

[commit-bot: I haz the power, 2015-07-30 11:55:00]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1263983002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1263983002/1

[commit-bot: I haz the power, 2015-07-30 11:55:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-30 11:56:21]

Patchset 1 (id:??) landed as
https://crrev.com/66d3e303ded89c565e8fb33d8000044cdcf2b8c1
Cr-Commit-Position: refs/heads/master@{#341100}

[timvolodine, 2015-07-30 12:48:27]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1252393003/ by timvolodine@chromium.org.

The reason for reverting is: hmm sorry this doesn't appear to have been the
reason for issues on the bot. putting the roll back in..

[timvolodine, 2015-07-30 13:52:58]

On 2015/07/30 12:48:27, timvolodine wrote:
> A revert of this CL (patchset #1 id:1) has been created in
> https://codereview.chromium.org/1252393003/ by
mailto:timvolodine@chromium.org.
> 
> The reason for reverting is: hmm sorry this doesn't appear to have been the
> reason for issues on the bot. putting the roll back in..

looks like this may be the cause after all (see
https://uberchromegw.corp.google.com/i/internal.client.clank_tot/builders/cla...)
I am going to reland the revert once more.

[timvolodine, 2015-07-30 13:53:52]

The CQ bit was checked by timvolodine@chromium.org

[commit-bot: I haz the power, 2015-07-30 13:54:08]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1263983002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1263983002/1

[commit-bot: I haz the power, 2015-07-30 13:54:50]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-30 13:55:24]

Patchset 1 (id:??) landed as
https://crrev.com/2437a647519eaa88abb281af73d3243a3d7a97e4
Cr-Commit-Position: refs/heads/master@{#341108}