Initial implementation of AudioTrack, AudioTrackList, VideoTrack, and VideoTrackList.

Source/platform/graphics/media/MediaPlayer.h

Index: Source/platform/graphics/media/MediaPlayer.h
diff --git a/Source/platform/graphics/media/MediaPlayer.h b/Source/platform/graphics/media/MediaPlayer.h
index db3d3b030f93f5d026a0fe064ccebf98bd261376..a4d1e295dcb06894864df376ab2cfc0efae27666 100644
--- a/Source/platform/graphics/media/MediaPlayer.h
+++ b/Source/platform/graphics/media/MediaPlayer.h
@@ -29,6 +29,7 @@
 #include "platform/PlatformExport.h"
 #include "platform/graphics/GraphicsTypes3D.h"
 #include "public/platform/WebMediaPlayer.h"
+#include "public/platform/WebMediaPlayerClient.h"
 #include "wtf/Forward.h"
 #include "wtf/Noncopyable.h"
 
@@ -103,8 +104,12 @@ public:
     virtual void mediaPlayerSetWebLayer(blink::WebLayer*) = 0;
     virtual void mediaPlayerSetOpaque(bool) = 0;
 
-    virtual void mediaPlayerDidAddTrack(blink::WebInbandTextTrack*) = 0;
-    virtual void mediaPlayerDidRemoveTrack(blink::WebInbandTextTrack*) = 0;
+    virtual void mediaPlayerDidAddVideoTrack(const AtomicString& id, const AtomicString& kind, const AtomicString& label, const AtomicString& language, bool selected) = 0;
+    virtual void mediaPlayerDidRemoveVideoTrack(const AtomicString& id) = 0;
+    virtual void mediaPlayerDidAddAudioTrack(const AtomicString& id, const AtomicString& kind, const AtomicString& label, const AtomicString& language, bool enabled) = 0;
+    virtual void mediaPlayerDidRemoveAudioTrack(const AtomicString& id) = 0;
+    virtual void mediaPlayerDidAddTextTrack(blink::WebInbandTextTrack*) = 0;
+    virtual void mediaPlayerDidRemoveTextTrack(blink::WebInbandTextTrack*) = 0;
 
     virtual void mediaPlayerMediaSourceOpened(blink::WebMediaSource*) = 0;
 };
@@ -197,6 +202,8 @@ public:
     virtual MediaKeyException generateKeyRequest(const String&, const unsigned char*, unsigned) = 0;
     virtual MediaKeyException cancelKeyRequest(const String&, const String&) = 0;
     virtual void setContentDecryptionModule(blink::WebContentDecryptionModule*) = 0;
+
+    virtual blink::WebMediaPlayer* webMediaPlayer() const = 0;
 };
 
 }