Remove SVGDocument from bindings generator and test cases

Remove SVGDocument from bindings generator and test cases

Bindings generator side to:
Remove SVGDocument binding
https://codereview.chromium.org/146193003

SVGDocument no longer exists as an interface,
so the test case that uses it broke, and can be removed.

Using real interfaces in test IDL files means changes to
real IDL files can break run-bindings-tests.
This is ok (we're not going to run r-b-t on every IDL edit!
and it's easy to fix), but something to be aware of.

It also was hard-coded as inheriting from Node in the CG,
which we can remove.

BUG=238366
TBR=haraken
NOTRY=true

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=166182

[Nils Barth (inactive), 2014-01-31 01:25:54]

FYI: fixing run-bindings-tests in presubmit script;
broken by changes in real IDL file.

[commit-bot: I haz the power, 2014-01-31 01:27:11]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/nbarth@chromium.org/151043002/1

[commit-bot: I haz the power, 2014-01-31 01:27:54]

Change committed as 166182

[commit-bot: I haz the power, 2014-01-31 01:27:58]

CQ bit was unchecked on CL. Ignoring.

[commit-bot: I haz the power, 2014-01-31 01:28:06]

CQ bit was unchecked on CL. Ignoring.

[haraken, 2014-01-31 01:38:05]

LGTM