Generates the DTLS identity in browser process and returns it to render process.

content/browser/media/dtls_identity_store.h

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_BROWSER_MEDIA_DTLS_IDENTITY_STORE_H_
+#define CONTENT_BROWSER_MEDIA_DTLS_IDENTITY_STORE_H_
+
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/singleton.h"
+
+class GURL;
+
+namespace base {
+class TaskRunner;
+}  // namespace base
+
+namespace content {
+
+// This is a singleton class called in the browser UI thread.
+// It dispatches DTLS identity requests to the background worker thread.
+class DTLSIdentityStore {
+ public:
+  static DTLSIdentityStore* GetInstance();
+  DTLSIdentityStore();
+  DTLSIdentityStore(const scoped_refptr<base::TaskRunner>& task_runner);
+  ~DTLSIdentityStore();
+
+  typedef base::Callback<void(const std::string&, const std::string&)>
+      OnCompleteCallback;
+
+  // Get the DTLS identity for the given domain of |url|, or generate a new one
+  // if not existent. Asynchronous. Called on the browser UI thread.
+  // |url| is the frame URL of the PeerConnection requesting the identity;
+  // |identity_name| is the name of the identity;
+  // |common_name| ???
+  // |callback| is the callback to return the result.
+  void GetOrGenerateIdentity(const GURL& url,
+                             const std::string& identity_name,
+                             const std::string& common_name,
+                             const OnCompleteCallback& callback
+                             );
+ private:
+  friend struct DefaultSingletonTraits<DTLSIdentityStore>;
+
+  // The TaskRunner for doing work on a worker thread.
+  scoped_refptr<base::TaskRunner> task_runner_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_MEDIA_DTLS_IDENTITY_STORE_H_