Disable CrossSiteDocumentBlockingForDifferentTargets for --site-per-process.

Disable CrossSiteDocumentBlockingForDifferentTargets for --site-per-process.

This test has two sibling OOPIFs from the same site, which requires
widget support and updates to DidStopLoading.

BUG=419087, 436250
TEST=Site isolation FYI bots go green.

Committed: https://crrev.com/57921d67c45726fc7b558c5afefc495fa67acd5b
Cr-Commit-Position: refs/heads/master@{#305538}

[Charlie Reis, 2014-11-24 23:43:31]

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

[Charlie Reis, 2014-11-24 23:43:31]

Nasko: This test used to pass because navigating the OOPIF to swappedout:// was
sending a DidStopLoading.  We now filter that out (as of
http://crrev.com/305443), which lets the test get to a sibling OOPIF, crashing
the renderer.

Putting the two subframes in different sites doesn't help, since we still don't
get a DidStopLoading.  I'm disabling it until those two blocking issues are
fixed.

[nasko, 2014-11-24 23:52:57]

LGTM

[Charlie Reis, 2014-11-24 23:54:44]

The CQ bit was checked by creis@chromium.org

[commit-bot: I haz the power, 2014-11-24 23:55:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/755013002/1

[commit-bot: I haz the power, 2014-11-25 00:54:35]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-25 00:56:08]

Patchset 1 (id:??) landed as
https://crrev.com/57921d67c45726fc7b558c5afefc495fa67acd5b
Cr-Commit-Position: refs/heads/master@{#305538}