Take the prefix from createElementNS into account for HTML elements

[gilles-leblanc]

Fixes #3139

[hoppipolla-critic-bot]

Critic review: https://critic.hoppipolla.co.uk/r/2769

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[gilles-leblanc]

There's a lot of files but for most of them (all the HTML*Element) the changes is almost identical and only consist of adding a new parameter to the constructor and passing it in.

[jdm]

Needs a rebase, unfortunately.

[gilles-leblanc]

@Ms2ger @jdm I have rebased and pushed.

[gilles-leblanc]

It's my bad, I see the failures are in WPT, I have always run ref and content.

[jdm]

Yep, your change fixed a bunch failing tests. My favourite kind of problem.

[gilles-leblanc]

I removed the expected fails in tests/wpt/metadata/dom/nodes/case.html.ini and rebased. Took a while because I haven't been able to run a subset of the wpt tests and they take over 30 minutes to run.

[jdm]

Haven't been able to? Even with ./mach wpt-test --include=/dom/nodes/case.html, for example? In addition, you can use --processes=4 to run multiple tests in parallel.

[jdm]

It looks like you should be able to remove the ini file altogether since there are no expected failures.

[bors-servo]

saw approval from Ms2ger
at gilles-leblanc@3a5a66d

[bors-servo]

merging gilles-leblanc/servo/issue-3139 = 3a5a66d into auto

[bors-servo]

gilles-leblanc/servo/issue-3139 = 3a5a66d merged ok, testing candidate = a4b4147

[bors-servo]

all tests pass:
success: http://build.servo.org/builders/linux/builds/164
success: http://build.servo.org/builders/mac/builds/166

[bors-servo]

fast-forwarding master to auto = a4b4147