Support subtitles for native fullscreen video

LayoutTests/TestExpectations

Index: LayoutTests/TestExpectations
diff --git a/LayoutTests/TestExpectations b/LayoutTests/TestExpectations
index cc72adcdcc60b98560e73576490855f9dcba2488..ce803b48094224b6cd7605323a2a5fc13bd853e2 100644
--- a/LayoutTests/TestExpectations
+++ b/LayoutTests/TestExpectations
@@ -1378,3 +1378,13 @@ crbug.com/292740 http/tests/security/xssAuditor/xss-filter-bypass-big5.html [ Ne
 crbug.com/292740 http/tests/security/xssAuditor/xss-filter-bypass-sjis.html [ NeedsManualRebaseline ]
 crbug.com/292740 http/tests/xmlhttprequest/origin-exact-matching.html [ NeedsManualRebaseline Timeout ]
 #crbug.com/292740 http/tests/xmlhttprequest/origin-whitelisting-https.html [ NeedsManualRebaseline ]
+
+# Android virtual suite shares the same expectation.
+crbug.com/100798 [ Debug ] virtual/android/fullscreen/full-screen-iframe-allowed.html [ Failure Pass ]
+crbug.com/100798 [ Debug ] virtual/android/fullscreen/full-screen-iframe-allowed-prefixed.html [ Failure Pass ]
+webkit.org/b/90704 virtual/android/fullscreen/exit-full-screen-iframe.html [ Failure Pass ]
+crbug.com/243782 virtual/android/fullscreen/full-screen-remove-ancestor.html [ Pass Timeout ]
+crbug.com/246077 virtual/android/fullscreen/full-screen-render-inline.html [ ImageOnlyFailure ]
+
+# Transient. Removes as https://codereview.chromium.org/23597036/ lands.
+crbug.com/254989 virtual/android/fullscreen/full-screen-stacking-context.html [ ImageOnlyFailure ]