Added DtlsCertificate, a ref counted object owning an SSLIdentity

talk/app/webrtc/dtlscertificate.cc

 /*
  * libjingle
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-#include "talk/app/webrtc/dtlsidentityservice.h"
+#include "talk/app/webrtc/dtlscertificate.h"
 
-#include "talk/app/webrtc/dtlsidentitystore.h"
-#include "webrtc/base/logging.h"
+#include "webrtc/base/checks.h"
 
 namespace webrtc {
 
-bool DtlsIdentityService::RequestIdentity(
-    const std::string& identity_name,
-    const std::string& common_name,
-    webrtc::DTLSIdentityRequestObserver* observer) {
-  if (identity_name != DtlsIdentityStore::kIdentityName ||
-      common_name != DtlsIdentityStore::kIdentityName) {
-    LOG(LS_WARNING) << "DtlsIdentityService::RequestIdentity called with "
-                    << "unsupported params, identity_name=" << identity_name
-                    << ", common_name=" << common_name;
-    return false;
-  }
-  store_->RequestIdentity(observer);
-  return true;
+rtc::scoped_refptr<DtlsCertificate> DtlsCertificate::Create(
+    rtc::scoped_ptr<rtc::SSLIdentity> identity) {
+  // TODO(hbos): |expires| should be specified (what is the right type for
+  // date?), and maybe tied to the identity generation?
+  return new rtc::RefCountedObject<DtlsCertificate>(identity.release(), 0.0);

[hbos, 2015/08/04 12:50:21]

In blink it looked like double was used for dates and a javascript
RTCCertificate is supposed to have an expires field, I added the same here but
it's not really used yet, just initializing it to 0.0... I could also remove it
until it's needed but I think an expires() might be helpful when integrating
with blink work.

+}
+
+DtlsCertificate::DtlsCertificate(rtc::SSLIdentity* identity, double expires)
+    : identity_(identity), expires_(expires) {
+  DCHECK(identity_.get());
+}
+
+rtc::SSLIdentity* DtlsCertificate::identity() const {
+  return identity_.get();
+}
+
+double DtlsCertificate::expires() const {
+  return expires_;
 }
 
 }  // namespace webrtc