repaint-rtl-column.html is no longer flaky

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=css3/flexbox/repaint-rtl-column.html

Mark it as failing on Yosemite and pass everywhere else.

R=ojan@chromium.org
BUG=520167

Review URL: https://codereview.chromium.org/1294853002

git-svn-id: svn://svn.chromium.org/blink/trunk@201263 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/TestExpectations

@@ -69,7 +69,6 @@ crbug.com/521097 [ Lion ] inspector-protocol/loading-iframe-document-node.html [
 crbug.com/521107 [ Debug ] fast/html/imports/import-custom-element-abort.html [ Crash Pass ]
 crbug.com/520164 [ Linux ] accessibility/is-richly-editable.html [ Failure Pass ]
 crbug.com/520166 compositing/overflow/do-not-repaint-if-scrolling-composited-layers.html [ Failure Pass ]
-crbug.com/520167 css3/flexbox/repaint-rtl-column.html [ Failure Pass ]
 crbug.com/520169 [ Win ] fast/dom/Geolocation/timestamp.html [ Failure Pass ]
 crbug.com/520170 [ Win ] fast/dom/timer-throttling-hidden-page.html [ Failure Pass ]
 crbug.com/520172 [ Win ] fast/dom/webtiming.html [ Failure Pass ]
@@ -989,6 +988,7 @@ crbug.com/509025 [ Yosemite ] compositing/squashing/repaint-via-layout-offset.ht
 crbug.com/509025 [ Yosemite ] compositing/squashing/resize-squashing-layer-that-needs-full-repaint.html [ Failure ]
 crbug.com/509025 [ Yosemite ] compositing/squashing/squash-partial-repaint-inside-squashed-layer.html [ Failure ]
 crbug.com/509025 [ Yosemite ] compositing/squashing/squashing-inside-preserve-3d-element.html [ Failure ]
+crbug.com/509025 [ Yosemite ] css3/flexbox/repaint-rtl-column.html [ Failure ]
 crbug.com/509025 [ Yosemite ] fast/css/css2-system-fonts.html [ Failure ]
 crbug.com/509025 [ Yosemite ] fast/css/font-face-data-uri-invalid.html [ Failure ]
 crbug.com/509025 [ Yosemite ] fast/css/fontfaceset-download-error.html [ Failure ]