Merge branch 'new-sysprof' into 'master'

Port profiling to sysprof-collector api

See merge request GNOME/gtk!2457

diff --cc gdk/gdkdrawcontext.c
Simple merge

diff --cc gdk/gdkframeclockidle.c
Simple merge

diff --cc gsk/gl/gskglrenderer.c
Simple merge

diff --cc gtk/gtkbuilderparser.c
Simple merge

diff --cc gtk/gtkcssnode.c
Simple merge

diff --cc gtk/gtkicontheme.c
Simple merge

diff --cc gtk/gtkwidget.c
Simple merge

diff --cc gtk/gtkwindow.c
Simple merge