Skip page refresh navigation in navigation observer

Skip page refresh navigation in navigation observer

Since page refresh navigations have the same source and destination url,
and do not help us attribute downloads, we can safely skip them (and
save the quota for other meaningful navigations).

BUG=698121
Review-Url: https://codereview.chromium.org/2728123003
Cr-Commit-Position: refs/heads/master@{#454658}
Committed: https://chromium.googlesource.com/chromium/src/+/0a5231e4ca6ec1af9908e4b35590da1cdf4918fa

[Jialiu Lin, 2017-03-03 19:13:06]

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

[Jialiu Lin, 2017-03-03 19:13:18]

Patchset #1 (id:1) has been deleted

[commit-bot: I haz the power, 2017-03-03 19:13:25]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Jialiu Lin, 2017-03-03 19:14:06]

jialiul@chromium.org changed reviewers:
+ vakh@chromium.org

[Jialiu Lin, 2017-03-03 19:14:07]

vakh@,
Could you take a look at this tiny CL? Thanks!

[vakh (use Gerrit instead), 2017-03-03 19:15:56]

lgtm

[commit-bot: I haz the power, 2017-03-03 20:00:05]

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

[commit-bot: I haz the power, 2017-03-03 20:00:06]

Dry run: This issue passed the CQ dry run.

[Jialiu Lin, 2017-03-03 20:04:56]

The CQ bit was checked by jialiul@chromium.org

[commit-bot: I haz the power, 2017-03-03 20:05:17]

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, 2017-03-03 20:12:12]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1488571496882220,
"parent_rev": "b02a7c1ab2ee8695d2ac3aeb43bd0ff0fc871ccf", "commit_rev":
"0a5231e4ca6ec1af9908e4b35590da1cdf4918fa"}

[commit-bot: I haz the power, 2017-03-03 20:12:53]

Description was changed from

==========
Skip page refresh navigation in navigation observer

Since page refresh navigations have the same source and destination url,
and do not help us attribute downloads, we can safely skip them (and
save the quota for other meaningful navigations).

BUG=698121
==========

to

==========
Skip page refresh navigation in navigation observer

Since page refresh navigations have the same source and destination url,
and do not help us attribute downloads, we can safely skip them (and
save the quota for other meaningful navigations).

BUG=698121

Review-Url: https://codereview.chromium.org/2728123003
Cr-Commit-Position: refs/heads/master@{#454658}
Committed:
https://chromium.googlesource.com/chromium/src/+/0a5231e4ca6ec1af9908e4b35590...
==========

[commit-bot: I haz the power, 2017-03-03 20:12:54]

Committed patchset #1 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/0a5231e4ca6ec1af9908e4b35590...