DtlsIdentityStoreInterface::RequestIdentity: const& parameters

webrtc/api/dtlsidentitystore.cc

Index: webrtc/api/dtlsidentitystore.cc
diff --git a/webrtc/api/dtlsidentitystore.cc b/webrtc/api/dtlsidentitystore.cc
index 31c9bc05434bdd6163a1c566a39d1c9f3284f4d1..afd6e6455852209e029fa598d46f60c22e3f37fe 100644
--- a/webrtc/api/dtlsidentitystore.cc
+++ b/webrtc/api/dtlsidentitystore.cc
@@ -123,12 +123,12 @@ DtlsIdentityStoreImpl::~DtlsIdentityStoreImpl() {
 
 void DtlsIdentityStoreImpl::RequestIdentity(
     rtc::KeyParams key_params,
-    rtc::Optional<uint64_t> expires,
+    const rtc::Optional<uint64_t>& expires_ms,
     const rtc::scoped_refptr<DtlsIdentityRequestObserver>& observer) {
   RTC_DCHECK(signaling_thread_->IsCurrent());
   RTC_DCHECK(observer);
 
-  // Dropping parameterization and |expires|.
+  // Dropping parameterization and |expires_ms|.
   // TODO(hbos,torbjorng): Use parameterizaton/expiration. webrtc:5092.
   GenerateIdentity(key_params.type(), observer);
 }