Make the ServiceProvider& arg to GetServiceProviderForFrame non-nullable.

Make the ServiceProvider& arg to GetServiceProviderForFrame non-nullable.

This call isn't meaningful with a null ServiceProvider&.

BUG=407683
Committed: https://crrev.com/afd3e88bf107971191bc5f45d24f7ba3b8106854
Cr-Commit-Position: refs/heads/master@{#294276}

[Sam McNally, 2014-09-10 08:20:40]

sammc@chromium.org changed reviewers:
+ darin@chromium.org

[darin (slow to review), 2014-09-10 15:40:59]

lgtm

[Sam McNally, 2014-09-10 23:24:20]

The CQ bit was checked by sammc@chromium.org

[commit-bot: I haz the power, 2014-09-10 23:50:01]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/555373003/1

[commit-bot: I haz the power, 2014-09-11 00:52:27]

Committed patchset #1 (id:1) as 048687c14c14d431979d9562890c006244e7dfc4

[commit-bot: I haz the power, 2014-09-11 00:55:49]

Patchset 1 (id:??) landed as
https://crrev.com/afd3e88bf107971191bc5f45d24f7ba3b8106854
Cr-Commit-Position: refs/heads/master@{#294276}