Remove unnecessary uses of HTMLDocument

Remove unnecessary uses of HTMLDocument

Most of HTMLDocument has already been merged into Document, so these
code paths no longer anything HTMLDocument-specific.

Drive-by:
Remove some unnecessary includes and fix typo in HTMLDocument.cpp

BUG=238368
Committed: https://crrev.com/3dda93ba7fa7ae42912dbdeae479b785eac0fe9a
Cr-Commit-Position: refs/heads/master@{#409188}

[foolip, 2016-08-01 11:31:31]

Description was changed from

==========
Remove unnecessary uses of HTMLDocument

BUG=238368
==========

to

==========
Remove unnecessary uses of HTMLDocument

Most of HTMLDocument has already been merged into Document, so these
code paths no longer anything HTMLDocument-specific.

Drive-by:
Remove some unnecessary includes and fix typo in HTMLDocument.cpp

BUG=238368
==========

[foolip, 2016-08-01 12:19:09]

The CQ bit was checked by foolip@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-08-01 12:19:18]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-01 13:41:15]

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

[commit-bot: I haz the power, 2016-08-01 13:41:16]

Dry run: This issue passed the CQ dry run.

[foolip, 2016-08-01 13:51:20]

foolip@chromium.org changed reviewers:
+ dominicc@chromium.org, tkent@chromium.org

[foolip, 2016-08-01 13:51:20]

PTAL

[foolip, 2016-08-01 13:52:28]

Renewed activity on https://github.com/whatwg/dom/issues/221 is what prompted me
to look into how HTMLDocument is used, but even if it never is removed, using it
only where necessarye seems like a good idea.

[tkent, 2016-08-01 22:46:45]

lgtm

[foolip, 2016-08-02 12:27:07]

The CQ bit was checked by foolip@chromium.org

[commit-bot: I haz the power, 2016-08-02 12:27:24]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-02 14:36:00]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-08-02 14:38:57]

Description was changed from

==========
Remove unnecessary uses of HTMLDocument

Most of HTMLDocument has already been merged into Document, so these
code paths no longer anything HTMLDocument-specific.

Drive-by:
Remove some unnecessary includes and fix typo in HTMLDocument.cpp

BUG=238368
==========

to

==========
Remove unnecessary uses of HTMLDocument

Most of HTMLDocument has already been merged into Document, so these
code paths no longer anything HTMLDocument-specific.

Drive-by:
Remove some unnecessary includes and fix typo in HTMLDocument.cpp

BUG=238368

Committed: https://crrev.com/3dda93ba7fa7ae42912dbdeae479b785eac0fe9a
Cr-Commit-Position: refs/heads/master@{#409188}
==========

[commit-bot: I haz the power, 2016-08-02 14:38:59]

Patchset 2 (id:??) landed as
https://crrev.com/3dda93ba7fa7ae42912dbdeae479b785eac0fe9a
Cr-Commit-Position: refs/heads/master@{#409188}