Replace scoped_ptr with unique_ptr in webrtc/base/

webrtc/base/sslstreamadapter.h

Index: webrtc/base/sslstreamadapter.h
diff --git a/webrtc/base/sslstreamadapter.h b/webrtc/base/sslstreamadapter.h
index 9a9446267d34f9b1f3564d1c6c48a510fc1f745d..c5045f184fb2ce3af74242dab3c29869e61b5084 100644
--- a/webrtc/base/sslstreamadapter.h
+++ b/webrtc/base/sslstreamadapter.h
@@ -11,6 +11,7 @@
 #ifndef WEBRTC_BASE_SSLSTREAMADAPTER_H_
 #define WEBRTC_BASE_SSLSTREAMADAPTER_H_
 
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -159,7 +160,7 @@ class SSLStreamAdapter : public StreamAdapterInterface {
   // Retrieves the peer's X.509 certificate, if a connection has been
   // established. It returns the transmitted over SSL, including the entire
   // chain.
-  virtual rtc::scoped_ptr<SSLCertificate> GetPeerCertificate() const = 0;
+  virtual std::unique_ptr<SSLCertificate> GetPeerCertificate() const = 0;
 
   // Retrieves the IANA registration id of the cipher suite used for the
   // connection (e.g. 0x2F for "TLS_RSA_WITH_AES_128_CBC_SHA").