css: Implement "unset"

Quoting the spec:
  If the cascaded value of a property is the unset keyword,
  then if it is an inherited property, this is treated as
  inherit, and if it is not, this is treated as initial.

Spec in question:
  http://dev.w3.org/csswg/css-cascade/

Also use unset in the reset-to-defaults.css we use to reset css in
reftests.

1 files changed, 54 insertions, 54 deletions

diff --git a/testsuite/reftests/reset-to-defaults.css b/testsuite/reftests/reset-to-defaults.css
index 1c27a8e72b..8654a5bf0f 100644
--- a/testsuite/reftests/reset-to-defaults.css
+++ b/testsuite/reftests/reset-to-defaults.css
@@ -7,60 +7,60 @@
  */
 
 * {
-  color: inherit;
-  font-size: inherit;
-  background-color: initial;
-  font-family: inherit;
-  font-style: inherit;
-  font-variant: inherit;
-  font-weight: inherit;
-  text-shadow: inherit;
-  icon-shadow: inherit;
-  box-shadow: initial;
-  margin-top: initial;
-  margin-left: initial;
-  margin-bottom: initial;
-  margin-right: initial;
-  padding-top: initial;
-  padding-left: initial;
-  padding-bottom: initial;
-  padding-right: initial;
-  border-top-style: initial;
-  border-top-width: initial;
-  border-left-style: initial;
-  border-left-width: initial;
-  border-bottom-style: initial;
-  border-bottom-width: initial;
-  border-right-style: initial;
-  border-right-width: initial;
-  border-top-left-radius: initial;
-  border-top-right-radius: initial;
-  border-bottom-right-radius: initial;
-  border-bottom-left-radius: initial;
-  outline-style: initial;
-  outline-width: initial;
-  outline-offset: initial;
-  background-clip: initial;
-  background-origin: initial;
-  background-size: initial;
-  background-position: initial;
-  border-top-color: initial;
-  border-right-color: initial;
-  border-bottom-color: initial;
-  border-left-color: initial;
-  outline-color:  initial;
-  background-repeat: initial;
-  background-image: initial;
-  border-image-source: initial;
-  border-image-repeat: initial;
-  border-image-slice: initial;
-  border-image-width: initial;
-  transition-property: initial;
-  transition-duration: initial;
-  transition-timing-function: initial;
-  transition-delay: initial;
-  engine: initial;
-  gtk-key-bindings: initial;
+  color: unset;
+  font-size: unset;
+  background-color: unset;
+  font-family: unset;
+  font-style: unset;
+  font-variant: unset;
+  font-weight: unset;
+  text-shadow: unset;
+  icon-shadow: unset;
+  box-shadow: unset;
+  margin-top: unset;
+  margin-left: unset;
+  margin-bottom: unset;
+  margin-right: unset;
+  padding-top: unset;
+  padding-left: unset;
+  padding-bottom: unset;
+  padding-right: unset;
+  border-top-style: unset;
+  border-top-width: unset;
+  border-left-style: unset;
+  border-left-width: unset;
+  border-bottom-style: unset;
+  border-bottom-width: unset;
+  border-right-style: unset;
+  border-right-width: unset;
+  border-top-left-radius: unset;
+  border-top-right-radius: unset;
+  border-bottom-right-radius: unset;
+  border-bottom-left-radius: unset;
+  outline-style: unset;
+  outline-width: unset;
+  outline-offset: unset;
+  background-clip: unset;
+  background-origin: unset;
+  background-size: unset;
+  background-position: unset;
+  border-top-color: unset;
+  border-right-color: unset;
+  border-bottom-color: unset;
+  border-left-color: unset;
+  outline-color:  unset;
+  background-repeat: unset;
+  background-image: unset;
+  border-image-source: unset;
+  border-image-repeat: unset;
+  border-image-slice: unset;
+  border-image-width: unset;
+  transition-property: unset;
+  transition-duration: unset;
+  transition-timing-function: unset;
+  transition-delay: unset;
+  engine: unset;
+  gtk-key-bindings: unset;
 
   -GtkWidget-focus-line-width: 0;
   -GtkWidget-focus-padding: 0;