Revert of Unify desktop and Android tab helper instantiation.

Revert of Unify desktop and Android tab helper instantiation. (https://codereview.chromium.org/144443003/)

Reason for revert:
This causes Clank to crash at startup, and makes tests fail http://build.chromium.org/p/chromium.linux/builders/Android%20Tests/builds/11575

Tried the revert locally, and Clank started normally.

Original issue's description:
> Unify desktop and Android tab helper instantiation.
> 
> BUG=337600
> TEST=zero visible change
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=247676

TBR=yfriedman@chromium.org,jam@chromium.org,avi@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=337600
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=247682

[cimamoglu (inactive), 2014-01-29 13:36:25]

Created Revert of Unify desktop and Android tab helper instantiation.

[commit-bot: I haz the power, 2014-01-29 13:36:35]

No LGTM from a valid reviewer yet. Only full committers are accepted.
Even if an LGTM may have been provided, it was from a non-committer or
a lowly provisional committer, _not_ a full super star committer.
See http://www.chromium.org/getting-involved/become-a-committer
Note that this has nothing to do with OWNERS files.

[cimamoglu (inactive), 2014-01-29 13:39:59]

+whywhat for LGTM

[whywhat, 2014-01-29 13:41:28]

lgtm

[commit-bot: I haz the power, 2014-01-29 13:41:54]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/cimamoglu@chromium.org/149393004/1

[commit-bot: I haz the power, 2014-01-29 13:42:14]

Change committed as 247682

[Avi (use Gerrit), 2014-01-29 16:49:41]

On 2014/01/29 13:42:14, I haz the power (commit-bot) wrote:
> Change committed as 247682

The link to the failure is a 404. As a favor to me, can you paste in the crash
backtrace in bug http://crbug.com/337600 ?

[Yaron, 2014-01-29 17:20:26]

On 2014/01/29 16:49:41, Avi wrote:
> On 2014/01/29 13:42:14, I haz the power (commit-bot) wrote:
> > Change committed as 247682
> 
> The link to the failure is a 404. As a favor to me, can you paste in the crash
> backtrace in bug http://crbug.com/337600 ?

It was a broken link:
http://build.chromium.org/p/chromium.linux/builders/Android%20Tests/builds/11575
works for me (removing the 25 in %2520). Also looking.

[Avi (use Gerrit), 2014-01-29 17:22:56]

On 2014/01/29 17:20:26, Yaron wrote:
> On 2014/01/29 16:49:41, Avi wrote:
> > On 2014/01/29 13:42:14, I haz the power (commit-bot) wrote:
> > > Change committed as 247682
> > 
> > The link to the failure is a 404. As a favor to me, can you paste in the
crash
> > backtrace in bug http://crbug.com/337600 ?
> 
> It was a broken link:
>
http://build.chromium.org/p/chromium.linux/builders/Android%2520Tests/builds/...
> works for me (removing the 25 in %2520). Also looking.

Yaron, I missed WindowAndroidHelper. I'm going to update the original CL.

[Yaron, 2014-01-29 17:29:08]

Damn. Sorry I missed it.

[Avi (use Gerrit), 2014-01-29 17:44:40]

On 2014/01/29 17:29:08, Yaron wrote:
> Damn. Sorry I missed it.

No problem. I kept pushing the commit button on the CQ when the Android bot was
repeatedly freaking out, so I don't come out smelling too sweet here, either.

The new version is going through the trybots on
https://codereview.chromium.org/144443003/ . We'll see how it goes.