[gtk+] (16 commits) Non-fast-forward update to branch wip/window-scales

[Alexander Larsson <alexl src gnome org>]

The branch 'wip/window-scales' 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:

 http://live.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  66cbe7a... add gdk_screen_ and gdk_window_get_scale_factor()
  7437aba... quartz: Implement get_scale_factor() on screen and window
  721c293... gtk: add gtk_widget_get_scale_factor()
  6f90173... gdk: Add gdk_cairo_surface_create_similar
  7c98dc1... Gtk: Use gdk_cairo_surface_create_similar
  5723cd9... pixel-cache: Refresh pixel cache on window scale factor cha
  25e9eac... configure: Add buildtime check for cairo_surface_set_device
  8fad044... gdkwindow: Respect cairo surfaces with device scale
  445d53c... wayland: Implement gdk_screen_get_monitor_scale()
  8e7c4b3... wayland: Require wayland-client 1.1.90
  b3791d9... wayland: Support gdk_window_get_scale
  6cb020c... icontheme: Add support for high resolution icons
  fa59e41... x11: Initial cut at supporting window scaling for X11

Commits added to the branch:

  38d78f4... Improve doc of gtk_text_iter_forward_search() (*)
  a5b22ab... add gdk_screen_ and gdk_window_get_scale_factor()
  ad7a1f0... quartz: Implement get_scale_factor() on screen and window
  66492f1... gtk: add gtk_widget_get_scale_factor()
  557e2e8... gdk: Add gdk_cairo_surface_create_similar
  dd46e02... Gtk: Use gdk_cairo_surface_create_similar
  c208d0b... pixel-cache: Refresh pixel cache on window scale factor cha
  950bde3... configure: Add buildtime check for cairo_surface_set_device
  c2de32d... gdkwindow: Respect cairo surfaces with device scale
  149b8dc... offscreenwindow: Handle window_scale
  506e6a9... wayland: Implement gdk_screen_get_monitor_scale()
  115ff79... wayland: Require wayland-client 1.1.90
  92959a9... wayland: Support gdk_window_get_scale
  59d2316... x11: Initial cut at supporting window scaling for X11
  18dab19... Add GDK_DPI_SCALE env var
  601e198... icontheme: Add support for high resolution icons

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