Bug 1499858 - Re-enable MP4Demuxer.CENCFragVideo gtest for Windows. r=jya

Differential Revision: https://phabricator.services.mozilla.com/D9030

--HG--
extra : moz-landing-system : lando

dom/media/gtest/TestMP4Demuxer.cpp

@@ -197,8 +197,6 @@ ToCryptoString(const CryptoSample& aCrypto)
   return res;
 }
 
-#ifndef XP_WIN // VC2013 doesn't support C++11 array initialization.
-
 TEST(MP4Demuxer, CENCFragVideo)
 {
   const char* video[] = {
@@ -400,8 +398,6 @@ TEST(MP4Demuxer, CENCFragAudio)
   });
 }
 
-#endif
-
 TEST(MP4Demuxer, GetNextKeyframe)
 {
   RefPtr<MP4DemuxerBinding> binding = new MP4DemuxerBinding("gizmo-frag.mp4");