Merge 106603 - BMW Car Configuration Page doesn't work (Only manifests in Chromium)

Merge 106603 - BMW Car Configuration Page doesn't work (Only manifests in Chromium)
https://bugs.webkit.org/show_bug.cgi?id=77312

Reviewed by Dimitri Glazkov.

When we autogenerated the event factory, we missed the check for
whether touch events were enabled at runtime:
http://trac.webkit.org/changeset/97933/trunk/Source/WebCore/dom/Document.cpp

This patch adds the check back.

Unfortunately, there isn't a testing frame work for
RuntimeEnabledFeatures.  The main difficulty is that these static bools
need to be set when WebKit is initialized and can't be changed (which
is why they're not part of WebCore::Settings).  To test them properly,
we'd need a testing framework that booted up WebKit for each test.

We could test this particular change (which doesn't need the bool to be
constant through the runtime of WebKit), but that would create a
sandtrap for future patches who might thing that this testing framework
can really be used to test RuntimeEnabledFeatures.

The net result is that Chromium is going to end up living with the
non-default codepath for these settings being untested, which will lead
to regressions like this one.  If we ened up with a bunch of these
regressions, we'll likely end up with a testing framework similar to
Chromium's browsers_tests, which create a fresh subprocess for each
test.

* dom/EventFactory.in:
* dom/make_event_factory.pl:
(defaultItemFactory):
(generateImplementation):


TBR=abarth@webkit.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=108863