Bug 1243734 - Part 5. Add MOZ_ENABLE_MASK_AS_SHORTHAND compile flag; r=ted r=dbaron

MozReview-Commit-ID: 8KbrEXnJqlp

layout/style/test/moz.build

@@ -99,3 +99,5 @@ TEST_HARNESS_FILES.testing.mochitest.tests.layout.style.test['css-visited'] += [
 ]
 
 DEFINES['MOZILLA_INTERNAL_API'] = True
+if CONFIG['MOZ_ENABLE_MASK_AS_SHORTHAND']:
+   HOST_DEFINES['MOZ_ENABLE_MASK_AS_SHORTHAND'] = True

old-configure.in

@@ -8943,6 +8943,16 @@ fi
 
 MOZ_CONFIG_ICU()
 
+dnl ========================================================
+dnl mask as short hand property
+dnl ========================================================
+dnl Uncommenting the next line would enable mask-as-shorthand feature.
+dnl MOZ_ENABLE_MASK_AS_SHORTHAND=1
+if test "$MOZ_ENABLE_MASK_AS_SHORTHAND"; then
+  AC_DEFINE(MOZ_ENABLE_MASK_AS_SHORTHAND)
+fi
+AC_SUBST(MOZ_ENABLE_MASK_AS_SHORTHAND)
+
 if test -z "$JS_SHARED_LIBRARY"; then
   AC_DEFINE(MOZ_STATIC_JS)
 fi