[gtk+] (10 commits) Created branch wip/css-optimize2

[Alexander Larsson <alexl src gnome org>]

The branch 'wip/css-optimize2' was created.

Summary of new commits:

  f0b09f6... Add internal versions of g_return_[val_]_if_fail
  5952707... css: Use internal return_if_fail in some commonly called co
  39d94a7... css: Start array allocation with a better size
  28283e6... css: Avoid allocations in gtk_css_value_array_compute
  ab7e332... css: Have a separate GtkCssInitialValue per property
  cdc5053... css: Introduce _gtk_css_value_needs_compute
  340c7f9... css: Short circuit gtk_css_value_initial_compute when possi
  8751b59... css: Avoid queue_resize in _gtk_widget_style_context_invali
  0cf03dd... Don't unnecessarily queue resize in GtkWindow.style_updated
  21ff39b... Don't queue resize for hidden widgets without a size group