[gtk] (10 commits) Created branch wip/otte/gdk

[Benjamin Otte <otte src gnome org>]

The branch 'wip/otte/gdk' was created.

Summary of new commits:

  d89a0ea... window: present() the toplevel only once
  8a914b5... window: Don't map children twice
  719e4b9... build: Define if options should be enabled or disbaled
  baf4970... surface: Remove generic invalidation calls
  388666a... surface: Pass width/height/scale to update_size()
  7baf2cf... surface: Make gdk_surface_update_size() update the size
  1dc47e4... surface: Add a private struct
  128077d... x11: Use GdkSurface's scale factor
  fe11ffa... broadway: Use scale factor of GdkSurface
  32bf21b... macos: Use GdkSurface's scale factor