Merge 119742 - Plumb CORS attribute information from HTMLMediaElement to media players so it can be…

LayoutTests/platform/mac/Skipped

 #
 # Copyright (C) 2008 Apple Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 #
 # 1.  Redistributions of source code must retain the above copyright
 #     notice, this list of conditions and the following disclaimer. 
 # 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 793 matching lines @@
 # scrollbars/scrollbar-miss-mousemove-disabled.html is asserting in markAllMisspellingsAndBadGrammarInRanges()
 # https://bugs.webkit.org/show_bug.cgi?id=85273
 scrollbars/scrollbar-miss-mousemove-disabled.html
 
 # Fail until SUBPIXEL_LAYOUT is enabled
 # https://bugs.webkit.org/show_bug.cgi?id=85532
 fast/sub-pixel/client-width-height-snapping.html
 fast/sub-pixel/layout-boxes-with-zoom.html
 fast/sub-pixel/size-of-box-with-zoom.html
 
+# No CORS support for media elements is implemented yet.
+http/tests/security/video-cross-origin-readback.html
+
 # media/audio-repaint.html sometimes fails on Lion Debug (Tests)
 # https://bugs.webkit.org/show_bug.cgi?id=84357
 media/audio-repaint.html
 
 # https://bugs.webkit.org/show_bug.cgi?id=85522
 http/tests/security/sandboxed-iframe-modify-self.html
 
 # https://bugs.webkit.org/show_bug.cgi?id=85523
 fullscreen/full-screen-iframe-legacy.html
 
 # https://bugs.webkit.org/show_bug.cgi?id=85524
 fast/dom/xmlhttprequest-constructor-in-detached-document.html
 
 # https://bugs.webkit.org/show_bug.cgi?id=85525
 media/video-played-reset.html
 
 # [Mac] IETC flexbox reference tests have pixel differences (due to embedded color profiles?)
 # https://bugs.webkit.org/show_bug.cgi?id=85666
 ietestcenter/css3/flexbox/