Implement certificate lifetime parameter as required by WebRTC RFC.

webrtc/base/opensslidentity.h

Index: webrtc/base/opensslidentity.h
diff --git a/webrtc/base/opensslidentity.h b/webrtc/base/opensslidentity.h
index c8aa69a76eee5551b6ddd748bc23c0fb2d630c82..dda50be775a635883a4580522cb5a1898222145a 100644
--- a/webrtc/base/opensslidentity.h
+++ b/webrtc/base/opensslidentity.h
@@ -102,7 +102,8 @@ class OpenSSLCertificate : public SSLCertificate {
 class OpenSSLIdentity : public SSLIdentity {
  public:
   static OpenSSLIdentity* Generate(const std::string& common_name,
-                                   const KeyParams& key_params);
+                                   const KeyParams& key_params,
+                                   time_t certificate_lifetime);
   static OpenSSLIdentity* GenerateForTest(const SSLIdentityParams& params);
   static SSLIdentity* FromPEMStrings(const std::string& private_key,
                                      const std::string& certificate);