Make sure we process all pending offer/answer requests before terminating.

talk/app/webrtc/dtlsidentitystore.cc

 /*
  * libjingle
  * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 13 matching lines @@
  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "talk/app/webrtc/dtlsidentitystore.h"
 
 #include "talk/app/webrtc/webrtcsessiondescriptionfactory.h"
 #include "webrtc/base/logging.h"
 
 using webrtc::DTLSIdentityRequestObserver;
-using webrtc::WebRtcSessionDescriptionFactory;
 
 namespace webrtc {
 
 namespace {
 
 enum {
   MSG_DESTROY,
   MSG_GENERATE_IDENTITY,
   MSG_GENERATE_IDENTITY_RESULT,
   MSG_RETURN_FREE_IDENTITY
@@ skipping 181 matching lines @@
 
 void DtlsIdentityStore::PostGenerateIdentityResult_w(
     rtc::scoped_ptr<rtc::SSLIdentity> identity) {
   DCHECK(rtc::Thread::Current() == worker_thread_);
 
   IdentityResultMessageData* msg =
       new IdentityResultMessageData(identity.release());
   signaling_thread_->Post(this, MSG_GENERATE_IDENTITY_RESULT, msg);
 }
 }  // namespace webrtc