Revert "[LayoutNG] Change some tests to standard mode"

This reverts commit 9a33e7f8687aaf54ddf33689ce7974bca1e7d8b2.

Reason for revert: Various layout tests failing since https://ci.chromium.org/buildbot/chromium.webkit/WebKit%20Mac10.13%20%28retina%29/64:

* fast/forms/select/select-initial-position.html
* fast/parser/001.html
* fast/table/backgr_border-table-quirks-collapsed-border.html
* fast/table/backgr_border-table-quirks.html


Original change's description:
> [LayoutNG] Change some tests to standard mode
> 
> This patch changes some tests to standard mode.
> 
> They currently fail in LayoutNG, probably due to quirks mode.
> Change them to standard mode to see if they still fail.
> 
> TBR=eae@chromium.org
> 
> Bug: 591099
> Change-Id: Ia41cbc42eb1a114a24c4a13411080ee7fae9cf2e
> Reviewed-on: https://chromium-review.googlesource.com/1142048
> Reviewed-by: Koji Ishii <kojii@chromium.org>
> Commit-Queue: Koji Ishii <kojii@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#576330}

TBR=eae@chromium.org,kojii@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 591099
Change-Id: I2dad54f85132c54d7edd603e6692c56a112a9a7a
Reviewed-on: https://chromium-review.googlesource.com/1148820
Reviewed-by: Derek Cheng <imcheng@chromium.org>
Commit-Queue: Derek Cheng <imcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577659}
48 files changed