Remove DCHECK when initializing the TabUsageRecorder.

Remove DCHECK when initializing the TabUsageRecorder.

Instead, the operation is now a no-op.

BUG=689765
Review-Url: https://codereview.chromium.org/2757293004
Cr-Commit-Position: refs/heads/master@{#458177}
Committed: https://chromium.googlesource.com/chromium/src/+/8c804e2dc91d1deb5401ef5b3f79db97025998dc

[Patrick Monette, 2017-03-20 17:02:23]

pmonette@chromium.org changed reviewers:
+ rkaplow@chromium.org

[Patrick Monette, 2017-03-20 17:02:23]

PTAL

[rkaplow, 2017-03-20 17:03:50]

lgtm

[Patrick Monette, 2017-03-20 18:42:10]

The CQ bit was checked by pmonette@chromium.org

[commit-bot: I haz the power, 2017-03-20 18:42:50]

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, 2017-03-20 19:21:23]

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

[commit-bot: I haz the power, 2017-03-20 19:21:24]

Try jobs failed on following builders:
  android_n5x_swarming_rel on master.tryserver.chromium.android (JOB_FAILED,
https://build.chromium.org/p/tryserver.chromium.android/builders/android_n5x_...)
  linux_chromium_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[Patrick Monette, 2017-03-20 19:53:21]

The CQ bit was checked by pmonette@chromium.org

[commit-bot: I haz the power, 2017-03-20 19:53:51]

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, 2017-03-20 20:53:38]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490039601144380, "parent_rev":
"09cc93d64e1794e3ac967c25ed6e356f0aab2146", "commit_rev":
"8c804e2dc91d1deb5401ef5b3f79db97025998dc"}

[commit-bot: I haz the power, 2017-03-20 20:54:24]

Description was changed from

==========
Remove DCHECK when initializing the TabUsageRecorder.

Instead, the operation is now a no-op.

BUG=689765
==========

to

==========
Remove DCHECK when initializing the TabUsageRecorder.

Instead, the operation is now a no-op.

BUG=689765

Review-Url: https://codereview.chromium.org/2757293004
Cr-Commit-Position: refs/heads/master@{#458177}
Committed:
https://chromium.googlesource.com/chromium/src/+/8c804e2dc91d1deb5401ef5b3f79...
==========

[commit-bot: I haz the power, 2017-03-20 20:54:24]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/8c804e2dc91d1deb5401ef5b3f79...