Re-mark virtual/android/fullscreen/video-specified-size.html as flaky

BUG=353746
TBR=
NOTRY=true

Review URL: https://codereview.chromium.org/1309903002

git-svn-id: svn://svn.chromium.org/blink/trunk@201001 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/LayoutTests/TestExpectations

@@ -1877,3 +1877,5 @@ crbug.com/502927 [ XP ] paint/frames/frameset-with-stacking-contexts.html [ Fail
 crbug.com/523073 media/video-display-aspect-ratio.html [ Pass Failure ]
 
 crbug.com/523403 [ Win Linux ] fast/text/atsui-rtl-override-selection.html [ NeedsRebaseline ]
+crbug.com/353746 virtual/android/fullscreen/video-specified-size.html [ ImageOnlyFailure Pass ]
+