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

content/renderer/media/dtls_identity_service.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_RENDERER_MEDIA_DTLS_IDENTITY_SERVICE_H_
+#define CONTENT_RENDERER_MEDIA_DTLS_IDENTITY_SERVICE_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "content/public/renderer/render_process_observer.h"
+#include "googleurl/src/gurl.h"
+#include "third_party/libjingle/source/talk/base/scoped_ptr.h"

[Ami GONE FROM CHROMIUM, 2013/06/06 21:33:04]

unnecessary see below

[jiayl, 2013/06/06 22:53:39]

Done.

+
+namespace content {
+
+class RenderThread;
+
+// TODO (jiayl): Move it to Libjingle and implement it there.
+class DTLSIdentityObserver {
+ public:
+  virtual ~DTLSIdentityObserver() {}
+  virtual void OnCompleted(const std::string& certificate,
+                           const std::string& private_key) = 0;
+};
+
+// This class handles DTLS identity requests by sending IPC messages to the
+// browser process.
+// TODO: implement webrtc::DTLSIdentityServiceInterface from Libjingle.
+class DTLSIdentityService : public RenderProcessObserver {
+ public:
+  DTLSIdentityService(const GURL& origin,
+                      talk_base::scoped_ptr<DTLSIdentityObserver>& observer);

[Ami GONE FROM CHROMIUM, 2013/06/06 21:33:04]

the ctor is not part of the interface, so can be pure chrome; i.e. you can use
chromium's scoped_ptr instead of introducing talk_base here.

[jiayl, 2013/06/06 22:53:39]

Done.

+  virtual ~DTLSIdentityService();
+
+  void Initialize();
+
+  // Request a DTLS identity. A new one will be gernerated if not existent.
+  // |identity_name| is used to identity an identity within an origin.
+  // |common_name| is the common name used to generated the certificate.
+  virtual void RequestIdentity(const std::string& identity_name,
+                               const std::string& common_name);
+
+ protected:
+  virtual RenderThread* GetRenderThread();

[Ami GONE FROM CHROMIUM, 2013/06/06 21:33:04]

Comment this is protected for testing.

[jiayl, 2013/06/06 22:53:39]

removed.

+
+ private:
+  // RenderProcessObserver implementation.
+  virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
+
+  void OnIdentityReady(const std::string& certificate,
+                       const std::string& private_key);
+
+  // The origin of the PeerConnection which owns this DTLSIdentityService.
+  GURL origin_;
+  talk_base::scoped_ptr<DTLSIdentityObserver> observer_;

[Ami GONE FROM CHROMIUM, 2013/06/06 21:33:04]

ditto above

[jiayl, 2013/06/06 22:53:39]

Done.

+  RenderThread* render_thread_;

[Ami GONE FROM CHROMIUM, 2013/06/06 21:33:04]

unused

[jiayl, 2013/06/06 22:53:39]

removed

+
+  DISALLOW_COPY_AND_ASSIGN(DTLSIdentityService);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_MEDIA_DTLS_IDENTITY_SERVICE_H_