Added DtlsCertificate, a ref counted object owning an SSLIdentity

talk/app/webrtc/dtlscertificate.cc

Index: talk/app/webrtc/dtlscertificate.cc
diff --git a/talk/app/webrtc/objc/RTCAVFoundationVideoSource+Internal.h b/talk/app/webrtc/dtlscertificate.cc
similarity index 76%
copy from talk/app/webrtc/objc/RTCAVFoundationVideoSource+Internal.h
copy to talk/app/webrtc/dtlscertificate.cc
index ffa6629c41cabb77005d43a929adcb9d49cb34a9..580ad950261474cd36a6aab699a642dcafb9f227 100644
--- a/talk/app/webrtc/objc/RTCAVFoundationVideoSource+Internal.h
+++ b/talk/app/webrtc/dtlscertificate.cc
@@ -25,12 +25,23 @@
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#import "RTCAVFoundationVideoSource.h"
+#include "talk/app/webrtc/dtlscertificate.h"
 
-#include "avfoundationvideocapturer.h"
+#include "webrtc/base/checks.h"
 
-@interface RTCAVFoundationVideoSource ()
+namespace webrtc {
 
-@property(nonatomic, readonly) webrtc::AVFoundationVideoCapturer* capturer;
+rtc::scoped_refptr<DtlsCertificate> DtlsCertificate::Create(
+    rtc::scoped_ptr<rtc::SSLIdentity> identity) {
+  return new rtc::RefCountedObject<DtlsCertificate>(identity.release());
+}
 
-@end
+DtlsCertificate::DtlsCertificate(rtc::SSLIdentity* identity)
+    : identity_(identity) {
+  DCHECK(identity_);
+}
+
+DtlsCertificate::~DtlsCertificate() {
+}
+
+}  // namespace webrtc