[gtk] (4 commits) Non-fast-forward update to branch a11y/component

[Matthias Clasen <matthiasc src gnome org>]

The branch 'a11y/component' 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:

  30115e0... atspi: Implement Component
  f42bd19... a11y: Add bounds change api
  0e571e7... widget: Mark the size as changed when it changes
  a7e40ad... atspi: Emit bounds-changed

Commits added to the branch:

  8e4f8a4... atspi: Implement Component
  d50ebd9... a11y: Add bounds change api
  75a0bef... widget: Mark the size as changed when it changes
  04a5183... atspi: Emit bounds-changed