Revert of RTCCertificate::Expires() and ::HasExpired() implemented

webrtc/base/rtccertificate.cc

Index: webrtc/base/rtccertificate.cc
diff --git a/webrtc/base/rtccertificate.cc b/webrtc/base/rtccertificate.cc
index 7b764bd72e66faa2a63afb49894f61414ca15d08..a176d9080b2cc02dacced71778f453d88b81a414 100644
--- a/webrtc/base/rtccertificate.cc
+++ b/webrtc/base/rtccertificate.cc
@@ -11,6 +11,7 @@
 #include "webrtc/base/rtccertificate.h"
 
 #include "webrtc/base/checks.h"
+#include "webrtc/base/timeutils.h"
 
 namespace rtc {
 
@@ -27,16 +28,13 @@
 RTCCertificate::~RTCCertificate() {
 }
 
-uint64_t RTCCertificate::Expires() const {
-  int64_t expires = ssl_certificate().CertificateExpirationTime();
-  if (expires != -1)
-    return static_cast<uint64_t>(expires) * kNumMillisecsPerSec;
-  // If the expiration time could not be retrieved return an expired timestamp.
-  return 0;  // = 1970-01-01
+uint64_t RTCCertificate::expires_timestamp_ns() const {
+  // TODO(hbos): Update once SSLIdentity/SSLCertificate supports expires field.
+  return 0;
 }
 
-bool RTCCertificate::HasExpired(uint64_t now) const {
-  return Expires() <= now;
+bool RTCCertificate::HasExpired() const {
+  return expires_timestamp_ns() <= TimeNanos();
 }
 
 const SSLCertificate& RTCCertificate::ssl_certificate() const {