[gtk] (8 commits) Non-fast-forward update to branch wip/matthiasc/css-values

[Matthias Clasen <matthiasc src gnome org>]

The branch 'wip/matthiasc/css-values' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  01ad5d7... Remove an unnecessary check
  896d16d... css: Compute selector tree changes ahead of time
  b769ba3... css: Implement the superset matcher smarter
  8a8db4c... css: Faster matching for simple selectors
  4f0c99a... Speed up gtk_widget_pick
  705a933... window: reduce casting
  403d522... styleanimation: Cut down on checks
  43f6654... css: Add gtk_css_style_get_static_style
  066a9b6... Add some css style tests

Commits added to the branch:

  cd8ffac... css: Compute selector tree changes ahead of time
  1764d28... css: Implement the superset matcher smarter
  2d628d4... css: Faster matching for simple selectors
  6a0275f... Speed up gtk_widget_pick
  c57f77b... css: Add gtk_css_style_get_static_style
  8be919d... Add some css style tests
  54467cb... quiet a compiler warning in release builds
  a10bc03... wip: reimplement css matching from scratch