Blink gardening, updated test expectations

BUG=354849
TBR=alancutter

Review URL: https://codereview.chromium.org/209813002

git-svn-id: svn://svn.chromium.org/blink/trunk@169833 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/TestExpectations

@@ -962,3 +962,4 @@ crbug.com/355459 [ Release ] inspector/elements/edit-dom-actions-shadow.html [ P
 
 crbug.com/355463 [ Win Debug ] css3/flexbox/repaint.html [ Pass Failure ]
 
+crbug.com/354849 [ XP ] fast/css/css2-system-fonts.html [ Failure ]