Keep reference to CDM to avoid it's premature destruction

media/blink/webcontentdecryptionmodule_impl.cc

Index: media/blink/webcontentdecryptionmodule_impl.cc
diff --git a/media/blink/webcontentdecryptionmodule_impl.cc b/media/blink/webcontentdecryptionmodule_impl.cc
index b54ebe2e8c0da6808004f6fc20017285bc5e2dcc..727f4d0be496b3b7f734bca538990ad82958a5b7 100644
--- a/media/blink/webcontentdecryptionmodule_impl.cc
+++ b/media/blink/webcontentdecryptionmodule_impl.cc
@@ -101,8 +101,8 @@ void WebContentDecryptionModuleImpl::setServerCertificate(
           new CdmResultPromise<>(result, std::string())));
 }
 
-CdmContext* WebContentDecryptionModuleImpl::GetCdmContext() {
-  return adapter_->GetCdmContext();
+scoped_refptr<MediaKeys> WebContentDecryptionModuleImpl::GetCdm() {
+  return adapter_->GetCdm();
 }
 
 }  // namespace media