A bunch of interfaces: Return scoped_ptr<SSLCertificate>

webrtc/base/sslstreamadapterhelper.cc

Index: webrtc/base/sslstreamadapterhelper.cc
diff --git a/webrtc/base/sslstreamadapterhelper.cc b/webrtc/base/sslstreamadapterhelper.cc
index 61c0e43ff78d56ef0c739328ba4c947a144839fd..4f5125bfc672fb5a5962586f40e553e74e536c54 100644
--- a/webrtc/base/sslstreamadapterhelper.cc
+++ b/webrtc/base/sslstreamadapterhelper.cc
@@ -76,12 +76,11 @@ StreamState SSLStreamAdapterHelper::GetState() const {
   // not reached
 }
 
-bool SSLStreamAdapterHelper::GetPeerCertificate(SSLCertificate** cert) const {
-  if (!peer_certificate_)
-    return false;
-
-  *cert = peer_certificate_->GetReference();
-  return true;
+rtc::scoped_ptr<SSLCertificate> SSLStreamAdapterHelper::GetPeerCertificate()
+    const {
+  return peer_certificate_ ? rtc::scoped_ptr<SSLCertificate>(
+                                 peer_certificate_->GetReference())
+                           : nullptr;
 }
 
 bool SSLStreamAdapterHelper::SetPeerCertificateDigest(