Move KeySystemInfo to media.

media/base/eme_constants.h

Index: media/base/eme_constants.h
diff --git a/content/public/common/eme_constants.h b/media/base/eme_constants.h
similarity index 90%
rename from content/public/common/eme_constants.h
rename to media/base/eme_constants.h
index aaf183eb3342d57964be6fabe97fda53cfe14613..27ebfffa4c20e7aedd6664914da4a263f1c69f4a 100644
--- a/content/public/common/eme_constants.h
+++ b/media/base/eme_constants.h
@@ -2,12 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CONTENT_PUBLIC_COMMON_EME_CONSTANTS_H_
-#define CONTENT_PUBLIC_COMMON_EME_CONSTANTS_H_
+#ifndef MEDIA_BASE_EME_CONSTANTS_H_
+#define MEDIA_BASE_EME_CONSTANTS_H_
 
 #include <stdint.h>
 
-namespace content {
+namespace media {
 
 // Defines bitmask values that specify registered initialization data types used
 // in Encrypted Media Extensions (EME).
@@ -48,6 +48,6 @@ enum EmeCodec {
 typedef uint32_t SupportedInitDataTypes;
 typedef uint32_t SupportedCodecs;
 
-}  // namespace content
+}  // namespace media
 
-#endif  // CONTENT_PUBLIC_COMMON_EME_CONSTANTS_H_
+#endif  // MEDIA_BASE_EME_CONSTANTS_H_