Encrypted Media: Rename NeedKey to EncryptedMediaInitData.

media/base/demuxer.h

Index: media/base/demuxer.h
diff --git a/media/base/demuxer.h b/media/base/demuxer.h
index 4658107b88e998805f5f4ed1e447d83a674da8ad..f7a9636e12be4d09b50e153a06cfd24c19cc508e 100644
--- a/media/base/demuxer.h
+++ b/media/base/demuxer.h
@@ -49,7 +49,8 @@ class MEDIA_EXPORT Demuxer : public DemuxerStreamProvider {
   // First parameter - The type of initialization data.
   // Second parameter - The initialization data associated with the stream.
   typedef base::Callback<void(const std::string& type,
-                              const std::vector<uint8>& init_data)> NeedKeyCB;
+                              const std::vector<uint8>& init_data)>
+      EncryptedMediaInitDataCB;
 
   Demuxer();
   ~Demuxer() override;