Replace scoped_ptr with unique_ptr in webrtc/base/

webrtc/p2p/base/transportchannel.h

Index: webrtc/p2p/base/transportchannel.h
diff --git a/webrtc/p2p/base/transportchannel.h b/webrtc/p2p/base/transportchannel.h
index 24f90e3cf6ff54539bc802e4e926d51fdb956198..333ca8778b134c64a51d1998cbd3e70bd4f97465 100644
--- a/webrtc/p2p/base/transportchannel.h
+++ b/webrtc/p2p/base/transportchannel.h
@@ -11,6 +11,7 @@
 #ifndef WEBRTC_P2P_BASE_TRANSPORTCHANNEL_H_
 #define WEBRTC_P2P_BASE_TRANSPORTCHANNEL_H_
 
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -130,7 +131,7 @@ class TransportChannel : public sigslot::has_slots<> {
   GetLocalCertificate() const = 0;
 
   // Gets a copy of the remote side's SSL certificate.
-  virtual rtc::scoped_ptr<rtc::SSLCertificate> GetRemoteSSLCertificate()
+  virtual std::unique_ptr<rtc::SSLCertificate> GetRemoteSSLCertificate()
       const = 0;
 
   // Allows key material to be extracted for external encryption.