Remove the now-unnecessary RequestTracker in a unit test.

Removes RequestTracker and related code.

BUG=585700

[stkhapugin, 2017-02-20 16:16:09]

Description was changed from

==========
rebae# Enter a description of the change. git cl w# This will be displayed on
the codereview site.
Merge branch 'ios-chrome-app-application_delegate_unit_tests' into address_todos


asdf

BUG=
==========

to

==========
Removes RequestTracker and related code.

BUG=585700
==========

[stkhapugin, 2017-02-20 16:16:10]

stkhapugin@chromium.org changed reviewers:
+ sdefresne@chromium.org

[stkhapugin, 2017-02-20 16:16:15]

The CQ bit was checked by stkhapugin@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-02-20 16:16:25]

Dry run: 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, 2017-02-20 17:44:27]

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

[commit-bot: I haz the power, 2017-02-20 17:44:28]

Dry run: This issue passed the CQ dry run.

[stkhapugin, 2017-02-21 10:22:49]

As promised, follow-up CL. PTAL

[sdefresne, 2017-02-21 10:40:30]

lgtm

https://codereview.chromium.org/2703183003/diff/1/ios/chrome/app/application_...
File ios/chrome/app/application_delegate/app_state_unittest.mm (right):

https://codereview.chromium.org/2703183003/diff/1/ios/chrome/app/application_...
ios/chrome/app/application_delegate/app_state_unittest.mm:294: :
thread_bundle_(web::TestWebThreadBundle::REAL_IO_THREAD) {}
Can you try to not pass web::TestWebThreadBundle::REAL_IO_THREAD to this
constructor (i.e. use the default constructor)? I think it may work with default
constructor which would avoid creating a real thread. If not, then we can go
back to this version.

[stkhapugin, 2017-04-07 15:31:16]

The CQ bit was checked by stkhapugin@chromium.org

[stkhapugin, 2017-04-07 15:31:16]

The patchset sent to the CQ was uploaded after l-g-t-m from
sdefresne@chromium.org
Link to the patchset: https://codereview.chromium.org/2703183003/#ps20001
(title: "comment")

[commit-bot: I haz the power, 2017-04-07 15:31:36]

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, 2017-04-07 16:23:10]

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

[commit-bot: I haz the power, 2017-04-07 16:23:11]

Try jobs failed on following builders:
  ios-simulator on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-simulator/bui...)

[stkhapugin, 2017-04-19 12:04:53]

The CQ bit was checked by stkhapugin@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-04-19 12:05:09]

Dry run: 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, 2017-04-19 12:55:20]

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

[commit-bot: I haz the power, 2017-04-19 12:55:21]

Dry run: Try jobs failed on following builders:
  ios-simulator on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-simulator/bui...)

[sdefresne, 2017-06-15 09:40:08]

On 2017/04/07 16:23:11, commit-bot: I haz the power wrote:
> Try jobs failed on following builders:
>   ios-simulator on master.tryserver.chromium.mac (JOB_FAILED,
>
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-simulator/bui...)

stkhapugin: ping?