Rename media switch "flash-join-media-session" to "FlashJoinsMediaSession"

media/base/media_switches.cc

Index: media/base/media_switches.cc
diff --git a/media/base/media_switches.cc b/media/base/media_switches.cc
index ef00108124892f087c06ef3aee9190cf8dc38fca..cb019c6334bc8c36cd1179cb7c39449d7cefd18e 100644
--- a/media/base/media_switches.cc
+++ b/media/base/media_switches.cc
@@ -136,7 +136,7 @@ const base::Feature kMediaFoundationH264Encoding{
 #if defined(ENABLE_PLUGINS)
 // Let flash join and be controlled by media session, only valid when
 // |kEnableDefaultMediaSession| is on.
-const base::Feature kFlashJoinsMediaSession{"flash-join-media-session",
+const base::Feature kFlashJoinsMediaSession{"FlashJoinsMediaSession",
                                             base::FEATURE_DISABLED_BY_DEFAULT};
 #endif  // defined(ENABLE_PLUGINS)