Move NoEventDispatchAssertion class to its own file

Move NoEventDispatchAssertion class to its own file

Move NoEventDispatchAssertion class to its own file instead of having it in
ContainerNode.h.

R=eseidel@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=175282

[eseidel, 2014-06-02 05:22:47]

lgtm

You are such a fantastic contributor to blink.  Thank you.

[commit-bot: I haz the power, 2014-06-02 05:22:58]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/ch.dumez@samsung.com/301173006/20001

[commit-bot: I haz the power, 2014-06-02 05:45:32]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[commit-bot: I haz the power, 2014-06-02 05:45:43]

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

[commit-bot: I haz the power, 2014-06-02 05:45:43]

Try jobs failed on following builders:
  win_gpu_triggered_tests on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/win_gpu_triggered...)

[Inactive, 2014-06-02 13:10:49]

The CQ bit was checked by ch.dumez@samsung.com

[commit-bot: I haz the power, 2014-06-02 13:11:07]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/ch.dumez@samsung.com/301173006/20001

[commit-bot: I haz the power, 2014-06-02 14:19:11]

Change committed as 175282