media: Convert mojo media defines to buildflags

media/mojo/clients/mojo_cdm_factory.cc

Index: media/mojo/clients/mojo_cdm_factory.cc
diff --git a/media/mojo/clients/mojo_cdm_factory.cc b/media/mojo/clients/mojo_cdm_factory.cc
index bad7a15ca9307775befda654ca871034b07faefa..408fdad811883d9fc58c3e9538e42242ebc7f137 100644
--- a/media/mojo/clients/mojo_cdm_factory.cc
+++ b/media/mojo/clients/mojo_cdm_factory.cc
@@ -12,6 +12,7 @@
 #include "media/base/key_systems.h"
 #include "media/cdm/aes_decryptor.h"
 #include "media/mojo/clients/mojo_cdm.h"
+#include "media/mojo/features.h"
 #include "services/service_manager/public/cpp/connect.h"
 #include "services/service_manager/public/interfaces/interface_provider.mojom.h"
 
@@ -47,7 +48,7 @@ void MojoCdmFactory::Create(
 // create the MojoCdm, giving the remote CDM a chance to handle |key_system|.
 // Note: We should not run AesDecryptor in the browser process except for
 // testing. See http://crbug.com/441957
-#if !defined(ENABLE_MOJO_RENDERER)
+#if !BUILDFLAG(ENABLE_MOJO_RENDERER)
   if (CanUseAesDecryptor(key_system)) {
     scoped_refptr<ContentDecryptionModule> cdm(
         new AesDecryptor(security_origin, session_message_cb, session_closed_cb,