[gtk] (31 commits) ...Merge branch 'icon-theme-api-rework' into 'master'

[Alexander Larsson <alexl src gnome org>]

Summary of changes:

  c691399... icontheme: Align function arguments
  021aaef... GtkIconPaintable: Always recolor when snapshotting.
  b529f77... IconTheme: Simplify icon scaling
  adccd13... Support aspect=TRUE in _gdk_pixbuf_new_from_stream_at_scale
  d69f7fd... IconTheme: Never fail a lookup or icon load
  de02769... icon-theme: Don't pre-scale pixbufs in gtk_icon_theme_looku
  6865744... Remove unnecessary image-missing fallbacks
  8788c76... icon theme: Also never fail in gtk_icon_theme_lookup_by_gic
  a053392... icontheme: Handle GEmblemIcon in lookup_by_gicon()
  1c253f5... icontheme: Move IMAGE_MISSING_RESOURCE_PATH to (private) he
  6ff9f21... GtkBuilder: Directly load the fallback missing image
  7c73f2f... GskPango: Allow specifying a custom shape snapshot handler
  fcc3c12... gtk_css_style_snapshot_icon_paintable: Fix uninitialized me
  8282698... textview: Use paintables instead of textures, and fix the s
  6317fd3... Replace last users of gtk_icon_paintable_download_texture (
  d45d604... Remove gtk_icon_paintable_download_texture() public API
  57ecb28... Add gtk_icon_paintable_get_icon_name()
  a772bf7... Add gtk_icon_paintable_get_resource_path()
  79699cc... Use G_OBJECT_TYPE_NAME instead of g_type_name_from_instance
  2be29f9... Remove stray space
  bdbafe6... icontheme: Optimize memory use and lookup speed by internal
  e27413a... icon-theme: Add GTK_ICON_LOOKUP_LOAD_IN_THREAD flag
  24fede0... GtkIconHelper: Trigger preload when css sizes is valid
  14b3b68... icontheme: Always return some icon name in get_icon_name() 
  344ad65... Rename GTK_ICON_LOOKUP_LOAD_IN_THREAD to GTK_ICON_LOOKUP_PR
  904eecd... icon paintable: Replace get_filename and get_resource_path 
  8f1253a... GtkIconPaintable: Add properties for file, icon-name and is
  ba781ec... Expose gtk_icon_paintable_new_for_file
  ad0e901... icon-theme: Add back and fix test for handling non-square i
  96a4bb4... Fix typo in GtkIconPaintable is-symbolic property
  1698369... Merge branch 'icon-theme-api-rework' into 'master'