[webui] get rid of more html[os=] rules

chrome/browser/resources/print_preview/print_preview.css

Index: chrome/browser/resources/print_preview/print_preview.css
diff --git a/chrome/browser/resources/print_preview/print_preview.css b/chrome/browser/resources/print_preview/print_preview.css
index 455579f34d1f2d3d5d27b18ef42ae0a10668b84a..59023077e5e7e6209c1b4d1f8c280a0dc374ec56 100644
--- a/chrome/browser/resources/print_preview/print_preview.css
+++ b/chrome/browser/resources/print_preview/print_preview.css
@@ -399,15 +399,14 @@ html[dir='rtl'] #decrement {
 
 /* TODO(estade): unfork this code. */
 .button-strip {
+<if expr="not pp_ifdef('toolkit_views')">
+  -webkit-box-direction: reverse;
+</if>
   -webkit-box-orient: horizontal;
   -webkit-box-pack: end;
   display: -webkit-box;
 }
 
-html:not([toolkit=views]) .button-strip {
-  -webkit-box-direction: reverse;
-}
-
 #print-preview .button-strip button {
   -webkit-margin-start: 4px;
   display: block;