Revert of Sample 1% url whitelisted PPAPI downloads to ping safe browsing server

Revert of Sample 1% url whitelisted PPAPI downloads to ping safe browsing server (patchset #7 id:140001 of https://codereview.chromium.org/2146703002/ )

Reason for revert:
high crashing rate on canary https://crbug.com/630778

Original issue's description:
> Sample 1% url whitelisted PPAPI downloads to ping SB server
>
> Similar to regular downloads, we want SB pings for requestors whose
> URLs match the SB whitelist in flash downloads. To achieve that, we
> sample 1% of whitelisted PPAPI downloads based on the
> SafeBrowsingService::whitelist_sample_rate() if the user is in
> extended reporting group and not in incognito mode.
>
> Also refactored download_protection_service_unittest to elliminate
> the use of MessageLoop (deprecated).
>
> BUG=610924
>
> Committed: https://crrev.com/96f81d5c22a83e5ea061484c7390f37e41816f31
> Cr-Commit-Position: refs/heads/master@{#406101}

TBR=asanka@chromium.org,thestig@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=610924
Committed: https://crrev.com/91cc320065aa4178827809fc158b3249211c9565
Cr-Commit-Position: refs/heads/master@{#408163}

[Jialiu Lin, 2016-07-27 16:34:35]

The CQ bit was checked by jialiul@chromium.org

[Jialiu Lin, 2016-07-27 16:34:36]

Created Revert of Sample 1% url whitelisted PPAPI downloads to ping safe
browsing server

[commit-bot: I haz the power, 2016-07-27 16:34:53]

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, 2016-07-27 17:18:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-27 17:19:46]

Description was changed from

==========
Revert of Sample 1% url whitelisted PPAPI downloads to ping safe browsing server
(patchset #7 id:140001 of https://codereview.chromium.org/2146703002/ )

Reason for revert:
high crashing rate on canary https://crbug.com/630778

Original issue's description:
> Sample 1% url whitelisted PPAPI downloads to ping SB server
> 
> Similar to regular downloads, we want SB pings for requestors whose
> URLs match the SB whitelist in flash downloads. To achieve that, we
> sample 1% of whitelisted PPAPI downloads based on the
> SafeBrowsingService::whitelist_sample_rate() if the user is in
> extended reporting group and not in incognito mode.
> 
> Also refactored download_protection_service_unittest to elliminate
> the use of MessageLoop (deprecated).
> 
> BUG=610924
> 
> Committed: https://crrev.com/96f81d5c22a83e5ea061484c7390f37e41816f31
> Cr-Commit-Position: refs/heads/master@{#406101}

TBR=asanka@chromium.org,thestig@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=610924
==========

to

==========
Revert of Sample 1% url whitelisted PPAPI downloads to ping safe browsing server
(patchset #7 id:140001 of https://codereview.chromium.org/2146703002/ )

Reason for revert:
high crashing rate on canary https://crbug.com/630778

Original issue's description:
> Sample 1% url whitelisted PPAPI downloads to ping SB server
>
> Similar to regular downloads, we want SB pings for requestors whose
> URLs match the SB whitelist in flash downloads. To achieve that, we
> sample 1% of whitelisted PPAPI downloads based on the
> SafeBrowsingService::whitelist_sample_rate() if the user is in
> extended reporting group and not in incognito mode.
>
> Also refactored download_protection_service_unittest to elliminate
> the use of MessageLoop (deprecated).
>
> BUG=610924
>
> Committed: https://crrev.com/96f81d5c22a83e5ea061484c7390f37e41816f31
> Cr-Commit-Position: refs/heads/master@{#406101}

TBR=asanka@chromium.org,thestig@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=610924

Committed: https://crrev.com/91cc320065aa4178827809fc158b3249211c9565
Cr-Commit-Position: refs/heads/master@{#408163}
==========

[commit-bot: I haz the power, 2016-07-27 17:19:47]

Patchset 1 (id:??) landed as
https://crrev.com/91cc320065aa4178827809fc158b3249211c9565
Cr-Commit-Position: refs/heads/master@{#408163}