Remove unnecessary [NoInterfaceObject] from testing IDL files

Remove unnecessary [NoInterfaceObject] from testing IDL files

Testing IDL files no longer need [NoInterfaceObject],
as we now don't feed them into the list of main interface files
('main_interface_idl_files' in generated_bindings.gyp);
previously it was necessary because we didn't distinguish these files.

This removes the extended attribute, simplifying them.

TBR=haraken
BUG=341748
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=169629

[Nils Barth (inactive), 2014-03-20 03:22:25]

De-crufting.

[Nils Barth (inactive), 2014-03-20 03:22:29]

The CQ bit was checked by nbarth@chromium.org

[commit-bot: I haz the power, 2014-03-20 03:22:33]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/nbarth@chromium.org/205943003/1

[commit-bot: I haz the power, 2014-03-20 03:25:06]

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

[commit-bot: I haz the power, 2014-03-20 03:25:07]

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

[Nils Barth (inactive), 2014-03-20 03:31:00]

The CQ bit was checked by nbarth@chromium.org

[commit-bot: I haz the power, 2014-03-20 03:31:03]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/nbarth@chromium.org/205943003/1

[commit-bot: I haz the power, 2014-03-20 04:28:52]

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

[commit-bot: I haz the power, 2014-03-20 04:28:52]

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

[haraken, 2014-03-20 04:32:03]

LGTM

[Nils Barth (inactive), 2014-03-20 05:46:26]

The CQ bit was checked by nbarth@chromium.org

[commit-bot: I haz the power, 2014-03-20 05:46:28]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/nbarth@chromium.org/205943003/1

[commit-bot: I haz the power, 2014-03-20 06:50:41]

Change committed as 169629