Remove DCHECK(!source_url.is_empty()) from RenderFrameImpl::decidePolicyForNavigation

Remove DCHECK(!source_url.is_empty()) from RenderFrameImpl::decidePolicyForNavigation

BUG=622509
Committed: https://crrev.com/77b02a9e18d0a359c570e871d970fc515d54a9aa
Cr-Commit-Position: refs/heads/master@{#405877}

[Tom Sepez, 2016-07-15 20:10:43]

tsepez@chromium.org changed reviewers:
+ creis@chromium.org

[Tom Sepez, 2016-07-15 20:10:44]

Charlie, second attempt to land this.  Keep the logic the same to avoid breaking
tests.

[Charlie Reis, 2016-07-15 20:20:32]

Ok.  The same POST bug is possible if a file page clears its opener, of course,
but there's no tests yet that will hit it.  I'll come back to this with lukasza@
when he's back and we'll remove the rest.

LGTM.

[Tom Sepez, 2016-07-15 20:22:22]

The CQ bit was checked by tsepez@chromium.org

[commit-bot: I haz the power, 2016-07-15 20:22:45]

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, 2016-07-15 22:21:28]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-15 22:21:36]

CQ bit was unchecked.

[commit-bot: I haz the power, 2016-07-15 22:23:20]

Description was changed from

==========
Remove DCHECK(!source_url.is_empty()) from
RenderFrameImpl::decidePolicyForNavigation

BUG=622509
==========

to

==========
Remove DCHECK(!source_url.is_empty()) from
RenderFrameImpl::decidePolicyForNavigation

BUG=622509

Committed: https://crrev.com/77b02a9e18d0a359c570e871d970fc515d54a9aa
Cr-Commit-Position: refs/heads/master@{#405877}
==========

[commit-bot: I haz the power, 2016-07-15 22:23:21]

Patchset 1 (id:??) landed as
https://crrev.com/77b02a9e18d0a359c570e871d970fc515d54a9aa
Cr-Commit-Position: refs/heads/master@{#405877}