[gtk] (11 commits) ...Merge branch 'wip/otte/css' into 'master'

[Benjamin Otte <otte src gnome org>]

Summary of changes:

  3177ac4... cssnode: Remove redundant check (*)
  8722837... pathbar: Remove unneeded code (*)
  546a748... widget: Replace style-updated signal with css_changed vfunc (*)
  db9730b... stylecontext: Remove the "changed" signal (*)
  b9c880f... testsuite: Remove the stylecontext test (*)
  31713ab... stylecontext: Remove gtk_style_context_new() (*)
  416182a... style context: Remove parent relationship (*)
  98b42f6... css: Remove unused function (*)
  b75d408... css: Make some local variables const (*)
  fcb08a2... stylecontext: Remove unused typedef (*)
  0ad7912... Merge branch 'wip/otte/css' into 'master'

(*) This commit already existed in another branch; no separate mail sent