This was useful because nsRuleData in the old style system may not hold
all the data, but the only subclass ServoSpecifiedValues is always able
to hold any data, and thus passes NS_STYLE_INHERIT_MASK to mSIDS. Given
this, this method and mSIDs seems to be useless and can be removed.
MozReview-Commit-ID: 4vWcV4DRS2i
This is necessary in order to parse style attributes using the subject
principal of the caller, rather than defaulting to the page principal.
MozReview-Commit-ID: GIshajQ28la
(Path is actually r=froydnj.)
Bug 1400459 devirtualized nsIAtom so that it is no longer a subclass of
nsISupports. This means that nsAtom is now a better name for it than nsIAtom.
MozReview-Commit-ID: 91U22X2NydP