Mark font-style-matching as failing on XP

Gardening.

NOTRY=true
TBR=drott@chromium.org
BUG=523021

Review URL: https://codereview.chromium.org/1300213008

git-svn-id: svn://svn.chromium.org/blink/trunk@200916 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/TestExpectations

@@ -700,7 +700,9 @@ crbug.com/396941 ietestcenter/css3/multicolumn/column-width-applies-to-015.htm [
 crbug.com/396945 ietestcenter/css3/namespaces/syntax-021.xml [ ImageOnlyFailure ]
 crbug.com/378610 [ Win7 ] svg/custom/focus-ring-text.svg [ ImageOnlyFailure ]
 
-crbug.com/515454 css3/fonts/font-style-matching.html [ Slow ]
+crbug.com/515454 [ Mac Win7 Win10 Android Linux ] css3/fonts/font-style-matching.html [ Slow ]
+crbug.com/523021 [ XP ] css3/fonts/font-style-matching.html [ Failure Slow ]
+
 crbug.com/514751 fast/text/first-letter-bad-line-boxes-crash.html [ NeedsRebaseline ]
 
 crbug.com/514751 [ Win ] css1/font_properties/font_style.html [ NeedsRebaseline ]