Bug 1454205 [wpt PR 10477] - Accept two values in the overflow shorth…

…and, a=testonly

Automatic update from web-platform-testsAccept two values in the overflow shorthand

w3c/csswg-drafts#2484 details the resolution
by the CSSWG to accept two values in the overflow shorthand. Update our
implementation to match this, and also update two existing CSSOM
serialization tests. Additionally remove tests that are duplicates of
those currently found in WPT.

Intent to Implement and Ship:
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/4qF8XPQ1z2s

Bug: 833105
Change-Id: Id8f61182a7d7369a2f575acfdbf608600d1218dd
Reviewed-on: https://chromium-review.googlesource.com/1013618
Commit-Queue: Chris Nardi <cnardichromium.org>
Reviewed-by: Rune Lillesveen <futharkchromium.org>
Cr-Commit-Position: refs/heads/master{#554078}

--

wpt-commits: e6756de059f68d445306ac35a6b8e80633d75925
wpt-pr: 10477

UltraBlame original commit: 22226423b006da14b61e173f36b6e228880d04db

testing/web-platform/meta/MANIFEST.json

@@ -3573924,7 +3573924,7 @@ html
 :
 [
 "
-48ca70f4c20da103276e1b053ca0e4613fcc2819
+85952fbd040de03f5082f28ba8116fd4827a1fc3
 "
 "
 testharness
@@ -3574168,7 +3574168,7 @@ html
 :
 [
 "
-8bfc0dff5da1859e17df31ceeca710d17a982109
+9211674fd69ddfa32d3bafcf2bc967977eb3ec31
 "
 "
 testharness

testing/web-platform/tests/css/cssom/overflow-serialization.html

@@ -24,15 +24,9 @@
 >
 CSSOM
 -
-Overlow
-property
-has
-different
+Overflow
+shorthand
 serialization
-than
-other
-shorthands
-.
 <
 /
 title
@@ -156,13 +150,13 @@
 -
 x
 :
-inherit
+scroll
 ;
 overflow
 -
 y
 :
-unset
+hidden
 ;
 }
 <
@@ -350,16 +344,9 @@
 cssText
 "
 overflow
--
-x
-:
-inherit
-;
-overflow
--
-y
 :
-unset
+scroll
+hidden
 ;
 "
 "
@@ -583,7 +570,7 @@
 overflowX
 =
 "
-inherit
+scroll
 "
 ;
 div
@@ -593,7 +580,7 @@
 overflowY
 =
 "
-unset
+hidden
 "
 ;
 assert_equals
@@ -604,6 +591,8 @@
 .
 overflow
 "
+scroll
+hidden
 "
 "
 Overflow
@@ -615,10 +604,9 @@
 with
 different
 keywords
-shouldn
-'
-t
+should
 serialize
+correctly
 .
 "
 )

testing/web-platform/tests/css/cssom/shorthand-values.html

@@ -525,15 +525,8 @@
 :
 '
 overflow
--
-x
 :
 scroll
-;
-overflow
--
-y
-:
 hidden
 ;
 '