This is the last step to be able to call matchMedia on display: none iframes.
This is green, except for some startup preference query tests that I'm going to
address in a blocking bug (making LangGroupFontPrefs global, basically).
The setup is similar to the ShadowRoot one, except we don't eagerly keep the
StyleSet around up-to-date, we only fill it if it ever had a pres context.
Differential Revision: https://phabricator.services.mozilla.com/D23903
--HG--
extra : moz-landing-system : lando
`*Inlines.h` shouldn't be included by another header file, but `nsPresContext.h`
does it. This causes include-hell which blocks the following fix.
Additionally, it causes an include hell between `PresShell.h` vs.
`nsIPresShell.h` and `nsPresContext.h if `Document.h` includes `PresShell.h`.
Therefore, this patch also solves this include hell with adding
`nsPresContextInlines.h`.
Differential Revision: https://phabricator.services.mozilla.com/D25333
--HG--
extra : moz-landing-system : lando
`*Inlines.h` shouldn't be included by another header file, but `nsPresContext.h`
does it. This causes include-hell which blocks the following fix.
Additionally, it causes an include hell between `PresShell.h` vs.
`nsIPresShell.h` and `nsPresContext.h if `Document.h` includes `PresShell.h`.
Therefore, this patch also solves this include hell with adding
`nsPresContextInlines.h`.
Differential Revision: https://phabricator.services.mozilla.com/D25333
--HG--
extra : moz-landing-system : lando
Emilio Cobos Álvarez
Masayuki Nakano
Dorel Luca