Move EME key system knowledge from content/ to chrome/.

content/renderer/media/crypto/key_systems_info.h

Index: content/renderer/media/crypto/key_systems_info.h
diff --git a/content/renderer/media/crypto/key_systems_info.h b/content/renderer/media/crypto/key_systems_info.h
index 989475beacc8c4ffb9ab8ff81d4b97f8c3eafb5b..e2fe128872ce947e115db8c956da0991a52fe566 100644
--- a/content/renderer/media/crypto/key_systems_info.h
+++ b/content/renderer/media/crypto/key_systems_info.h
@@ -7,19 +7,12 @@
 
 #include <string>
 
-#include "base/basictypes.h"
-// TODO(ddorwin): Remove when AddKeySystems is removed.
-#include "content/public/renderer/key_system_info.h"
-
 namespace WebKit {
 class WebString;
 }
 
 namespace content {
 
-// TODO(ddorwin): Move registration to ContentClient.
-void AddKeySystems(std::vector<KeySystemInfo>* key_systems_info);
-
 // Returns true if canPlayType should return an empty string for |key_system|.
 bool IsCanPlayTypeSuppressed(const std::string& key_system);