Makes PreviewsService IsPreviewsTypeEnabled aware of new CPAT Feature

Makes PreviewsService IsPreviewsTypeEnabled aware of new CPAT Feature

Adds support for new DataReductionProxyDecidesTransform Feature in
determining whether some preview types are enabled in the
PreviewsService's IsPreviewsTypeEnabled().

BUG=735974
Review-Url: https://codereview.chromium.org/2963553002
Cr-Commit-Position: refs/heads/master@{#482653}
Committed: https://chromium.googlesource.com/chromium/src/+/4305ff0e2b75705c2cc96603e8c202eade920106

[dougarnett, 2017-06-27 15:07:45]

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

[commit-bot: I haz the power, 2017-06-27 15:07:58]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[dougarnett, 2017-06-27 15:15:21]

dougarnett@chromium.org changed reviewers:
+ ryansturm@chromium.org

[commit-bot: I haz the power, 2017-06-27 16:08:36]

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

[commit-bot: I haz the power, 2017-06-27 16:08:37]

Dry run: This issue passed the CQ dry run.

[RyanSturm, 2017-06-27 16:50:39]

lgtm! I'm hoping we can get rid of some of the config ShouldEnable* logic at
some point as well.

[dougarnett, 2017-06-27 16:58:32]

The CQ bit was checked by dougarnett@chromium.org

[commit-bot: I haz the power, 2017-06-27 16:58:42]

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, 2017-06-27 17:01:36]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1498582712821440, "parent_rev":
"cc71d4e0ecab89b4f51f73af9a48f54f342faa0e", "commit_rev":
"4305ff0e2b75705c2cc96603e8c202eade920106"}

[commit-bot: I haz the power, 2017-06-27 17:01:49]

Description was changed from

==========
Makes PreviewsService IsPreviewsTypeEnabled aware of new CPAT Feature

Adds support for new DataReductionProxyDecidesTransform Feature in
determining whether some preview types are enabled in the
PreviewsService's IsPreviewsTypeEnabled().

BUG=735974
==========

to

==========
Makes PreviewsService IsPreviewsTypeEnabled aware of new CPAT Feature

Adds support for new DataReductionProxyDecidesTransform Feature in
determining whether some preview types are enabled in the
PreviewsService's IsPreviewsTypeEnabled().

BUG=735974

Review-Url: https://codereview.chromium.org/2963553002
Cr-Commit-Position: refs/heads/master@{#482653}
Committed:
https://chromium.googlesource.com/chromium/src/+/4305ff0e2b75705c2cc96603e8c2...
==========

[commit-bot: I haz the power, 2017-06-27 17:01:50]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/4305ff0e2b75705c2cc96603e8c2...