media: Move key_system_names to media/base/

media/base/key_system_names.h

Index: media/base/key_system_names.h
diff --git a/media/cdm/key_system_names.h b/media/base/key_system_names.h
similarity index 89%
rename from media/cdm/key_system_names.h
rename to media/base/key_system_names.h
index 8b231718fffa89d8620f0751cc68783cd229ebac..a150528ba64d053acc2f00abb1994bc85c85db44 100644
--- a/media/cdm/key_system_names.h
+++ b/media/base/key_system_names.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef MEDIA_CDM_KEY_SYSTEM_NAMES_H_
-#define MEDIA_CDM_KEY_SYSTEM_NAMES_H_
+#ifndef MEDIA_BASE_KEY_SYSTEM_NAMES_H_
+#define MEDIA_BASE_KEY_SYSTEM_NAMES_H_
 
 #include <string>
 
@@ -31,4 +31,4 @@ MEDIA_EXPORT bool IsExternalClearKey(const std::string& key_system);
 
 }  // namespace media
 
-#endif  // MEDIA_CDM_KEY_SYSTEM_NAMES_H_
+#endif  // MEDIA_BASE_KEY_SYSTEM_NAMES_H_