Add about_flag for experimenting MediaSession on Desktop

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 f9ade75b07fe10ad0a4d0f10a925af69dc8e2892..e32d7fd40f1f3579c611e27e9a511f5571bdd1ea 100644
--- a/media/base/media_switches.cc
+++ b/media/base/media_switches.cc
@@ -71,7 +71,12 @@ const char kUseCras[] = "use-cras";
 // each other. This is different from the Media Session API as it is enabling a
 // default behaviour for the browser.
 const char kEnableDefaultMediaSession[] = "enable-default-media-session";

[xhwang, 2016/10/18 17:26:59]

Please add more comments about what the allowed values are.

[Zhiqiang Zhang (Slow), 2016/10/18 18:51:54]

Done.

-#endif
+
+#if defined(ENABLE_PLUGINS)
+const char kEnableDefaultMediaSessionWithFlash[] = "with-flash";

[Alexei Svitkine (slow), 2016/10/18 16:51:38]

Add a comment mentioning that this is the value for the specific flag.

[Zhiqiang Zhang (Slow), 2016/10/18 18:51:54]

Done.

+#endif  // defined(ENABLE_PLUGINS)
+
+#endif  // !defined(OS_ANDROID)
 
 // Use fake device for Media Stream to replace actual camera and microphone.
 const char kUseFakeDeviceForMediaStream[] = "use-fake-device-for-media-stream";
@@ -128,13 +133,6 @@ const base::Feature kMediaFoundationH264Encoding{
     "MediaFoundationH264Encoding", base::FEATURE_DISABLED_BY_DEFAULT};
 #endif  // defined(OS_WIN)
 
-#if defined(ENABLE_PLUGINS)
-// Let flash join and be controlled by media session, only valid when
-// |kEnableDefaultMediaSession| is on.
-const base::Feature kFlashJoinsMediaSession{"FlashJoinsMediaSession",
-                                            base::FEATURE_DISABLED_BY_DEFAULT};
-#endif  // defined(ENABLE_PLUGINS)
-
 // Use new audio rendering mixer.
 const base::Feature kNewAudioRenderingMixingStrategy{
     "NewAudioRenderingMixingStrategy", base::FEATURE_DISABLED_BY_DEFAULT};