Don't propagate sandbox flags to an opened window unless triggered entirely by script.

Don't propagate sandbox flags to an opened window unless triggered entirely by script.

This was regressed in http://src.chromium.org/viewvc/blink?revision=161843&view=revision,
when we started propagating sandbox flags to new windows via FrameLoader::forceSandboxFlags
even if the new window was caused by clicking a link with target="_blank".

BUG=353253
TEST=http/tests/navigation/new-window-sandboxed-iframe.html

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=169970

[Nate Chapin, 2014-03-21 22:51:45]

I should take another stab at cleaning up CreateWindow.cpp. For now, though, a
bugfix.

[abarth-chromium, 2014-03-24 03:48:42]

lgtm

[Nate Chapin, 2014-03-24 16:40:45]

The CQ bit was checked by japhet@chromium.org

[commit-bot: I haz the power, 2014-03-24 16:40:50]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/japhet@chromium.org/208853004/40001

[commit-bot: I haz the power, 2014-03-24 17:12:24]

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

[commit-bot: I haz the power, 2014-03-24 17:12:24]

Try jobs failed on following builders:
  tryserver.blink on mac_blink_rel

[Nate Chapin, 2014-03-24 17:13:44]

The CQ bit was checked by japhet@chromium.org

[commit-bot: I haz the power, 2014-03-24 17:13:49]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/japhet@chromium.org/208853004/40001

[commit-bot: I haz the power, 2014-03-24 17:38:52]

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

[commit-bot: I haz the power, 2014-03-24 17:38:52]

Try jobs failed on following builders:
  tryserver.blink on mac_blink_rel

[Nate Chapin, 2014-03-25 18:02:57]

The CQ bit was checked by japhet@chromium.org

[commit-bot: I haz the power, 2014-03-25 18:03:05]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/japhet@chromium.org/208853004/40001

[commit-bot: I haz the power, 2014-03-25 18:36:04]

Change committed as 169970