Add support for "image-set"

third_party/WebKit/LayoutTests/fast/css/image-set-unprefixed-expected.txt

Index: third_party/WebKit/LayoutTests/fast/css/image-set-unprefixed-expected.txt
diff --git a/third_party/WebKit/LayoutTests/fast/css/image-set-unprefixed-expected.txt b/third_party/WebKit/LayoutTests/fast/css/image-set-unprefixed-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4e63bd241e16db5c577870dd40d18c47bd0549d1
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/fast/css/image-set-unprefixed-expected.txt
@@ -0,0 +1,61 @@
+
+Single value for background-image : url("http://www.webkit.org/a") 1x
+Unprefixed: PASS
+Prefixed: PASS
+
+Multiple values for background-image : url("http://www.webkit.org/a") 1x, url("http://www.webkit.org/b") 2x
+Unprefixed: PASS
+Prefixed: PASS
+
+Multiple values for background-image, out of order : url("http://www.webkit.org/c") 3x, url("http://www.webkit.org/b") 2x, url("http://www.webkit.org/a") 1x
+Unprefixed: PASS
+Prefixed: PASS
+
+Duplicate values for background-image : url("http://www.webkit.org/c") 1x, url("http://www.webkit.org/b") 2x, url("http://www.webkit.org/a") 1x
+Unprefixed: PASS
+Prefixed: PASS
+
+Fractional values for background-image : url("http://www.webkit.org/c") 0.2x, url("http://www.webkit.org/b") 2.3x, url("http://www.webkit.org/a") 12.3456x
+Unprefixed: PASS
+Prefixed: PASS
+
+Single value for list-style-image : url("http://www.webkit.org/a") 1x
+Unprefixed: PASS
+Prefixed: PASS
+
+Multiple values for list-style-image : url("http://www.webkit.org/a") 1x, url("http://www.webkit.org/b") 2x
+Unprefixed: PASS
+Prefixed: PASS
+
+Multiple values for list-style-image, out of order : url("http://www.webkit.org/c") 3x, url("http://www.webkit.org/b") 2x, url("http://www.webkit.org/a") 1x
+Unprefixed: PASS
+Prefixed: PASS
+
+Duplicate values for list-style-image : url("http://www.webkit.org/c") 1x, url("http://www.webkit.org/b") 2x, url("http://www.webkit.org/a") 1x
+Unprefixed: PASS
+Prefixed: PASS
+
+Fractional values for list-style-image : url("http://www.webkit.org/c") 0.2x, url("http://www.webkit.org/b") 2.3x, url("http://www.webkit.org/a") 12.3456x
+Unprefixed: PASS
+Prefixed: PASS
+
+Single value for content : url("http://www.webkit.org/a") 1x
+Unprefixed: PASS
+Prefixed: PASS
+
+Multiple values for content : url("http://www.webkit.org/a") 1x, url("http://www.webkit.org/b") 2x
+Unprefixed: PASS
+Prefixed: PASS
+
+Multiple values for content, out of order : url("http://www.webkit.org/c") 3x, url("http://www.webkit.org/b") 2x, url("http://www.webkit.org/a") 1x
+Unprefixed: PASS
+Prefixed: PASS
+
+Duplicate values for content : url("http://www.webkit.org/c") 1x, url("http://www.webkit.org/b") 2x, url("http://www.webkit.org/a") 1x
+Unprefixed: PASS
+Prefixed: PASS
+
+Fractional values for content : url("http://www.webkit.org/c") 0.2x, url("http://www.webkit.org/b") 2.3x, url("http://www.webkit.org/a") 12.3456x
+Unprefixed: PASS
+Prefixed: PASS
+