[gtk+] HighContrast: Fix shadow size

[Matthias Clasen <matthiasc src gnome org>]

commit afab635f9d09b6c6c2f2a3ca9bacd1002646dc0f
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Nov 14 18:05:06 2015 -0500

    HighContrast: Fix shadow size
    
    Ensure that the shadow extents don't change as we go to backdrop,
    to prevent windows from jumping.

 gtk/theme/HighContrast/_common.scss |    1 +
 gtk/theme/HighContrast/gtk.css      |    2 +-
 2 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/gtk/theme/HighContrast/_common.scss b/gtk/theme/HighContrast/_common.scss
index 1c5cc59..d17f8b0 100644
--- a/gtk/theme/HighContrast/_common.scss
+++ b/gtk/theme/HighContrast/_common.scss
@@ -2462,6 +2462,7 @@ decoration {
 
   &:backdrop {
     box-shadow: 0 2px 6px 2px transparentize(black, 0.8),
+                0 3px 9px 1px transparent,
                 0 0 0 1px $_wm_border_backdrop;
   }
   &.tiled {
diff --git a/gtk/theme/HighContrast/gtk.css b/gtk/theme/HighContrast/gtk.css
index d2a83b9..9deffdc 100644
--- a/gtk/theme/HighContrast/gtk.css
+++ b/gtk/theme/HighContrast/gtk.css
@@ -2739,7 +2739,7 @@ decoration {
   /* this is used for the resize cursor area */
   margin: 10px; }
   decoration:backdrop {
-    box-shadow: 0 2px 6px 2px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(0, 0, 0, 0.18); }
+    box-shadow: 0 2px 6px 2px rgba(0, 0, 0, 0.2), 0 3px 9px 1px transparent, 0 0 0 1px rgba(0, 0, 0, 0.18); }
   decoration.tiled {
     border-radius: 0; }
   decoration.csd.popup {