media: Rename MediaKeys to ContentDecryptionModule

media/mojo/services/mojo_cdm_service_context.cc

Index: media/mojo/services/mojo_cdm_service_context.cc
diff --git a/media/mojo/services/mojo_cdm_service_context.cc b/media/mojo/services/mojo_cdm_service_context.cc
index 7a549653d027406c181660e653e3964f1a4c20cf..5b8880b6d364583f16a0a8931844158f63b7d9e1 100644
--- a/media/mojo/services/mojo_cdm_service_context.cc
+++ b/media/mojo/services/mojo_cdm_service_context.cc
@@ -6,7 +6,7 @@
 
 #include "base/bind.h"
 #include "base/logging.h"
-#include "media/base/media_keys.h"
+#include "media/base/content_decryption_module.h"
 #include "media/mojo/services/mojo_cdm_service.h"
 
 namespace media {
@@ -32,7 +32,8 @@ void MojoCdmServiceContext::UnregisterCdm(int cdm_id) {
   cdm_services_.erase(cdm_id);
 }
 
-scoped_refptr<MediaKeys> MojoCdmServiceContext::GetCdm(int cdm_id) {
+scoped_refptr<ContentDecryptionModule> MojoCdmServiceContext::GetCdm(
+    int cdm_id) {
   auto cdm_service = cdm_services_.find(cdm_id);
   if (cdm_service == cdm_services_.end()) {
     LOG(ERROR) << "CDM service not found: " << cdm_id;