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

content/browser/renderer_host/media/dtls_identity_service_host.cc

+// 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.
+
+#include "content/browser/renderer_host/media/dtls_identity_service_host.h"
+
+#include "base/bind.h"
+#include "content/common/media/dtls_identity_messages.h"
+#include "content/public/browser/render_process_host.h"
+
+namespace content {
+
+DTLSIdentityServiceHost::DTLSIdentityServiceHost(int render_process_id)
+    : render_process_id_(render_process_id) {}
+
+DTLSIdentityServiceHost::~DTLSIdentityServiceHost() {}
+
+bool DTLSIdentityServiceHost::OnMessageReceived(const IPC::Message& message,
+                                                bool* message_was_ok) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(DTLSIdentityServiceHost, message, *message_was_ok)
+  IPC_MESSAGE_HANDLER(DTLSIdentityMsg_GetOrGenerate, OnGetOrGenerateIdentity)

[jam, 2013/06/06 16:22:32]

nit: indent next two lines

[jiayl, 2013/06/06 17:07:37]

Done.

+  IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP_EX()
+  return handled;
+}
+
+void DTLSIdentityServiceHost::OnGetOrGenerateIdentity(
+    const GURL& origin,
+    const std::string& identity_name,
+    const std::string& common_name) {
+  LOG(INFO) << "Sent identity request to DTLSIdentityStore with "

[jam, 2013/06/06 16:22:32]

same comment re logging as other files

[jiayl, 2013/06/06 17:07:37]

Done.

+            << "origin = " << origin.spec() << ", "
+            << "identity_name = " << identity_name << ", "
+            << "common_name = " << common_name << ".";
+
+  DTLSIdentityStore::GetInstance()->GetOrGenerateIdentity(
+      origin,
+      identity_name,
+      common_name,
+      base::Bind(&DTLSIdentityServiceHost::OnCompleteIO, this));
+}
+
+void DTLSIdentityServiceHost::OnCompleteIO(
+    const std::string& certificate,
+    const std::string& private_key) const {
+  content::BrowserThread::PostTask(

[jam, 2013/06/06 16:22:32]

you can send the reply directly here (see BrowserMessageFilter::Send), instead
of going to the UI thread first. then you don't need to keep render_process_id_

[jiayl, 2013/06/06 17:07:37]

Done.

+      content::BrowserThread::UI,
+      FROM_HERE,
+      base::Bind(&DTLSIdentityServiceHost::OnCompleteUI,
+                 this,
+                 certificate,
+                 private_key));
+}
+
+void DTLSIdentityServiceHost::OnCompleteUI(
+    const std::string& certificate,
+    const std::string& private_key) const {
+  LOG(INFO) << "Identity request completed for render process id "
+            << render_process_id_;
+
+  RenderProcessHost* render_process_host =
+      RenderProcessHost::FromID(render_process_id_);
+  if (render_process_host == NULL)
+    return;
+  render_process_host->Send(
+      new DTLSIdentityMsg_IdentityReady(certificate, private_key));
+}
+
+}  // namespace content