Move css-flexbox-height-animation-stretch.html to NeverFixTests.

In general we've been putting all of the manual tests that we never
want to run into NeverFixTests. It looks like this particular test was
imported before the csswg-test merge, and it should have been disabled
at that time but wasn't.

Bug: 728522
Change-Id: I467c1c3db7d7a0417d521d18356d6ff56efb87f5
Reviewed-on: https://chromium-review.googlesource.com/521444Reviewed-by: Philip Jägenstedt <foolip@chromium.org>
Commit-Queue: Philip Jägenstedt <foolip@chromium.org>
Cr-Commit-Position: refs/heads/master@{#476427}

third_party/WebKit/LayoutTests/NeverFixTests

@@ -752,6 +752,7 @@ external/wpt/css/css-writing-modes-3/page-flow-direction-slr-005.xht [ WontFix ]
 external/wpt/css/css-writing-modes-3/page-flow-direction-srl-004.xht [ WontFix ]
 external/wpt/2dcontext/drawing-paths-to-the-canvas/canvas_focus_drawFocusIfNeeded_AAPI_001-manual.html [ WontFix ]
 external/wpt/html/semantics/embedded-content/the-img-element/ismap/img-ismap-coordinates-manual.html [ WontFix ]
+external/wpt/css/css-flexbox-1/css-flexbox-height-animation-stretch.html [ WontFix ]
 
 # These directories have manual tests that don't have to run with
 # run-webkit-tests; see https://crbug.com/359838.

third_party/WebKit/LayoutTests/TestExpectations

@@ -1331,9 +1331,6 @@ crbug.com/492664 external/wpt/css/css-writing-modes-3/table-progression-vrl-001.
 crbug.com/492664 external/wpt/css/css-writing-modes-3/table-progression-vrl-003.html [ Failure ]
 crbug.com/492664 external/wpt/css/css-writing-modes-3/table-progression-vrl-004.html [ Failure ]
 
-# An animated manual test that should not be run
-crbug.com/728522 external/wpt/css/css-flexbox-1/css-flexbox-height-animation-stretch.html [ Skip ]
-
 crbug.com/637055 fast/css/outline-offset-large.html [ Skip ]
 
 # Either "combo" or split should run: http://testthewebforward.org/docs/css-naming.html