Remove EventPath::parent() in favor of NodeRenderingTraversal::parent().

Remove EventPath::parent() in favor of NodeRenderingTraversal::parent().

EventPath::parent() is only used in adjusting the result of HitTest in some places.
For example, if a text node is clicked, we have to adjust the result to the *reasonable* parent element of the text node.

In adjusting, we should use NodeRenderingTraversal::parent() instead of EventPath::parent().
That means the adjusted result is no longer shadow roots or insertion points.
The result would be the parent element of the text node in the composed tree.
That should make sense because neither shadow roots nor insertion points are rendered.

BUG=354366
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=169923

[hayato, 2014-03-25 05:40:27]

PTAL

[esprehn, 2014-03-25 06:20:58]

On 2014/03/25 05:40:27, hayato wrote:
> PTAL

Lgtm, awesome!

[hayato, 2014-03-25 06:28:12]

The CQ bit was checked by hayato@chromium.org

[commit-bot: I haz the power, 2014-03-25 06:28:20]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hayato@chromium.org/210753002/1

[commit-bot: I haz the power, 2014-03-25 06:51:52]

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

[commit-bot: I haz the power, 2014-03-25 06:51:52]

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

[hayato, 2014-03-25 07:56:16]

The CQ bit was checked by hayato@chromium.org

[commit-bot: I haz the power, 2014-03-25 07:56:18]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/hayato@chromium.org/210753002/1

[commit-bot: I haz the power, 2014-03-25 08:55:33]

Change committed as 169923