querySelector* fast-path missing namespace check for no namespace.

querySelector* fast-path missing namespace check for no namespace.

querySelector* does not allow selectors with namespaces, yet selectors
with no namespace are still allowed. Check for empty namespace before
hitting the fast path for tag names.

R=esprehn@chromium.org
BUG=605502
Committed: https://crrev.com/f0e4bdb8bdd9f2eb306b1ffc29e881c0cc258794
Cr-Commit-Position: refs/heads/master@{#390417}

[rune, 2016-04-28 10:39:27]

The CQ bit was checked by rune@opera.com to run a CQ dry run

[commit-bot: I haz the power, 2016-04-28 10:39:40]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1932673002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1932673002/40001

[rune, 2016-04-28 11:11:31]

First, I added a check for no namespace in the fast-path matchesTagName, but
since this is extremely rare, I decided to go for the slow path for "|elm"
instead of adding code to the fast path.

[commit-bot: I haz the power, 2016-04-28 11:49:39]

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

[commit-bot: I haz the power, 2016-04-28 11:49:40]

Dry run: This issue passed the CQ dry run.

[esprehn, 2016-04-28 15:22:43]

Lgtm, thanks for the quick fix!

[rune, 2016-04-28 17:39:03]

The CQ bit was checked by rune@opera.com

[commit-bot: I haz the power, 2016-04-28 17:39:26]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1932673002/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1932673002/40001

[commit-bot: I haz the power, 2016-04-28 17:46:46]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2016-04-30 17:19:29]

Patchset 3 (id:??) landed as
https://crrev.com/f0e4bdb8bdd9f2eb306b1ffc29e881c0cc258794
Cr-Commit-Position: refs/heads/master@{#390417}

[commit-bot: I haz the power, 2016-04-30 17:56:26]

Description was changed from

==========
querySelector* fast-path missing namespace check for no namespace.

querySelector* does not allow selectors with namespaces, yet selectors
with no namespace are still allowed. Check for empty namespace before
hitting the fast path for tag names.

R=esprehn@chromium.org
BUG=605502
==========

to

==========
querySelector* fast-path missing namespace check for no namespace.

querySelector* does not allow selectors with namespaces, yet selectors
with no namespace are still allowed. Check for empty namespace before
hitting the fast path for tag names.

R=esprehn@chromium.org
BUG=605502

Committed: https://crrev.com/f0e4bdb8bdd9f2eb306b1ffc29e881c0cc258794
Cr-Commit-Position: refs/heads/master@{#390417}
==========