Use stricter typing for traverse roots in SelectorQuery

Use stricter typing for traverse roots in SelectorQuery

Use stricter typing for traverse roots in SelectorQuery. We now use Element or
ContainerNode, as appropriate. This enables using the faster DOM traversal method
specializations as the compiler now knows these are container nodes and not
simply generic Node types.

R=esprehn, adamk

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=166344

[adamk, 2014-02-03 22:15:59]

lgtm

[Inactive, 2014-02-03 22:27:57]

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

[commit-bot: I haz the power, 2014-02-03 22:28:23]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/ch.dumez@samsung.com/153073002/1

[commit-bot: I haz the power, 2014-02-04 00:44:46]

Change committed as 166344

[commit-bot: I haz the power, 2014-02-04 00:44:48]

CQ bit was unchecked on CL. Ignoring.

[commit-bot: I haz the power, 2014-02-04 00:44:51]

CQ bit was unchecked on CL. Ignoring.

[commit-bot: I haz the power, 2014-02-04 00:44:53]

CQ bit was unchecked on CL. Ignoring.

[commit-bot: I haz the power, 2014-02-04 00:44:53]

CQ bit was unchecked on CL. Ignoring.

[commit-bot: I haz the power, 2014-02-04 00:45:48]

CQ bit was unchecked on CL. Ignoring.