Unprefix CSS cursor values zoom-in and zoom-out

Source/core/css/CSSValueKeywords.in

Index: Source/core/css/CSSValueKeywords.in
diff --git a/Source/core/css/CSSValueKeywords.in b/Source/core/css/CSSValueKeywords.in
index 1dab6a9b37d59240d3a7ad592de6853a908aa848..70c824d9cbc13f7a5bfed3e5b80b84c599196db6 100644
--- a/Source/core/css/CSSValueKeywords.in
+++ b/Source/core/css/CSSValueKeywords.in
@@ -372,8 +372,8 @@ alias
 progress
 no-drop
 not-allowed
--webkit-zoom-in
--webkit-zoom-out
+zoom-in
+zoom-out
 e-resize
 ne-resize
 nw-resize
@@ -394,6 +394,8 @@ help
 all-scroll
 -webkit-grab
 -webkit-grabbing
+-webkit-zoom-in
+-webkit-zoom-out

[Julien - ping for review, 2014/05/19 09:17:55]

Would it be worth it to have the concept of alias_for= for keywords too? (we
have it for properties and it automates the conversion)

[philipj_slow, 2014/05/19 09:52:51]

AFAICT from the generated CSSPropertyNames.{h,cpp}, an aliased properties get no
CSSPropertyID of its own. Since UseCounter uses CSSPropertyID I don't know how
to add UseCounters for aliased properties, and assume the same problem would
happen for aliased value keywords?

I'm guessing an alias would also make both keywords both stringify to the
unprefixed keyword? Is that a change that can be made without any UseCounter
data?

[Julien - ping for review, 2014/05/21 11:38:10]

Yes but we could prevent this problem by having some translation code instead of
aliasing. This is not an issue for now as we don't UseCount CSSValueID.
Good point. Now that you mention it, CSS transition (that we are in the process
of unprefixing) is not using aliases for this reason. I can't recall what
motivated the decision but it's probably to be on the safe side.

[philipj_slow, 2014/05/21 11:57:59]

Do you mean a function like mapKeywordToAlias() that would be applied after
we've had a chance to notify UseCounter about the interesting bits? After this
has landed I'll submit a review with UseCounters for -webkit-zoom-in/out. I'll
add you to that review to see if you think there's a reasonable way to add
aliasing to the mix.

 // none
 //
 // CSS_PROP_DIRECTION: