Add support for "image-set"

third_party/WebKit/LayoutTests/fast/css/cursor-parsing-image-set.html

Index: third_party/WebKit/LayoutTests/fast/css/cursor-parsing-image-set.html
diff --git a/third_party/WebKit/LayoutTests/fast/css/cursor-parsing-image-set.html b/third_party/WebKit/LayoutTests/fast/css/cursor-parsing-image-set.html
index 041e34214e84da2c4cb9a4d2195da50617e1813f..2d12fdaf755234672f61f9619b0dc4d0616942fb 100644
--- a/third_party/WebKit/LayoutTests/fast/css/cursor-parsing-image-set.html
+++ b/third_party/WebKit/LayoutTests/fast/css/cursor-parsing-image-set.html
@@ -8,7 +8,7 @@
 <p><a href=https://bugs.webkit.org/show_bug.cgi?id=99493>Bug 99493</a></p>
 <div id="console"></div>
 <script>
-description("Test the parsing of the cursor property when used with -webkit-image-set.");
+description("Test the parsing of the cursor property when used with image-set.");
 
 function makeCursorRule(rule)
 {
@@ -36,10 +36,10 @@ function roundtripCssRule(cssText)
 // to avoid triggering any network activity.
 
 debug('Test a bunch of cursor rules which should round-trip exactly.');
-testCursorRule('-webkit-image-set(url("file:///foo.png") 1x), auto');
-testCursorRule('-webkit-image-set(url("file:///foo.png") 1x, url("file:///foo2x.png") 2x), auto');
-testCursorRule('-webkit-image-set(url("file:///foo.png") 1x, url("file:///foo2x.png") 2x) 2 3, auto');
-testCursorRule('-webkit-image-set(url("file:///foo03.png") 0.3x, url("file:///foo5x.png") 5x) 6 5, url("file:///foo.png") 12 3, pointer');
+testCursorRule('image-set(url("file:///foo.png") 1x), auto');
+testCursorRule('image-set(url("file:///foo.png") 1x, url("file:///foo2x.png") 2x), auto');
+testCursorRule('image-set(url("file:///foo.png") 1x, url("file:///foo2x.png") 2x) 2 3, auto');
+testCursorRule('image-set(url("file:///foo03.png") 0.3x, url("file:///foo5x.png") 5x) 6 5, url("file:///foo.png") 12 3, pointer');
 
 successfullyParsed = true;
 </script>