I could have done this through a CSSLoader to allow all CSS unit quirks but
I wasn't planning to start passing around document and element references
everywhere, so instead just did it manually by accepting numbers/floats in
addition to pixel and percent.
Apparently Bing does rapid-fire loading/unloading of module scripts that causes
our attempts at resolving and initializing them to end up with null fetched
modules. Returning null is probably a better way to handle this than crashing
on ms->ModuleRecord().
This restores support for using HTML tag styling of margins on the body.
Reftests post bug still pass for dynamic changes, so does the newly-added
test for body margins and frames that tests the old styling method.
This also removes the reftest list for stylo testing for obvious reasons.
Of course it couldn't be trivial :P
wrapObject is a pure virtual function which prevents an abstract constructor
from being used.
So, we need to extend DOMEventTargetHelper (applicable acronym: DETH :D) with
a wrapObject implementation - in a derivative class is the clearest way to do
this, as opposed to making DETH more complex.
This removes some restrictions on whether an interface that implements
QueryInterface can have a non-abstract ancestor.
This restriction was put in place back when we automatically added
QueryInterface to all rootmost non-abstract interfaces (~Pale Moon 24).
At the time, we needed to make sure it did NOT end up on EventTarget, because
back then WebIDL quickstubs would replace the QI implementation on non-WebIDL
EventTargets with the WebIDL one, which would not work for them.
Since then, we have removed WebIDL quickstubs and we now explicitly list which
interfaces get QueryInterface, so this check is no longer needed.
This adds the later spec revision's contentBoxSize and borderBoxSize, and the
inlineSize and blockSize concepts.
The older spec contentRect remains functional as well for backwards
compatibility with the earlier spec (that was IMHO perfectly fine as it was...)
GetNodeDepth() is a specialized version for ResizeObserver to get the depth of
a node across Shadow DOM. It's better to have this in ResizeObserver.cpp
instead of the generic ContentUtils.
Also updated the function to bypass the shadow root itself and not count it
because ResizeObserver doesn't observe the shadow root and only needs the
relative depths among all observed targets. IOW we use the flattened tree here.
