RTCCertificate serialization.

webrtc/base/sslidentity.h

Index: webrtc/base/sslidentity.h
diff --git a/webrtc/base/sslidentity.h b/webrtc/base/sslidentity.h
index f9fef312f511b3d7261c02d2b271939db4bc836f..da94e76486a3c340ce64f8e9f150c4b88152c0e2 100644
--- a/webrtc/base/sslidentity.h
+++ b/webrtc/base/sslidentity.h
@@ -227,6 +227,8 @@ class SSLIdentity {
 
   // Returns a temporary reference to the certificate.
   virtual const SSLCertificate& certificate() const = 0;
+  virtual std::string PrivateKeyToPEMString() const = 0;
+  virtual std::string PublicKeyToPEMString() const = 0;
 
   // Helpers for parsing converting between PEM and DER format.
   static bool PemToDer(const std::string& pem_type,
@@ -237,6 +239,9 @@ class SSLIdentity {
                               size_t length);
 };
 
+bool operator==(const SSLIdentity& a, const SSLIdentity& b);
+bool operator!=(const SSLIdentity& a, const SSLIdentity& b);
+
 // Convert from ASN1 time as restricted by RFC 5280 to seconds from 1970-01-01
 // 00.00 ("epoch").  If the ASN1 time cannot be read, return -1.  The data at
 // |s| is not 0-terminated; its char count is defined by |length|.