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

content/common/media/webrtc_identity_messages.h

Index: content/common/media/webrtc_identity_messages.h
diff --git a/content/common/media/webrtc_identity_messages.h b/content/common/media/webrtc_identity_messages.h
new file mode 100644
index 0000000000000000000000000000000000000000..a8712970986171246827dc371a337f6b1dee027b
--- /dev/null
+++ b/content/common/media/webrtc_identity_messages.h
@@ -0,0 +1,32 @@
+// 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.
+
+// IPC messages for requesting WebRTC identity.
+// Multiply-included message file, hence no include guard.
+
+#include "googleurl/src/gurl.h"
+#include "ipc/ipc_message_macros.h"
+
+#define IPC_MESSAGE_START WebRTCIdentityMsgStart
+
+// Messages sent from the renderer to the browser.
+// Request a WebRTC identity.
+IPC_MESSAGE_CONTROL4(WebRTCIdentityMsg_RequestIdentity,
+                     int /* request_id */,
+                     GURL /* origin */,
+                     std::string /* identity_name */,
+                     std::string /* common_name */)
+// Cancel a WebRTC identity request.
+IPC_MESSAGE_CONTROL1(WebRTCIdentityMsg_CancelRequest, int /* request_id */)
+
+// Messages sent from the browser to the renderer.
+// Return a WebRTC identity.
+IPC_MESSAGE_CONTROL3(WebRTCIdentityHostMsg_IdentityReady,
+                     int /* request_id */,
+                     std::string /* certificate */,
+                     std::string /* private_key */)
+// Notifies an error from the identity request.
+IPC_MESSAGE_CONTROL2(WebRTCIdentityHostMsg_RequestFailed,
+                     int /* request_id */,
+                     int /* error */)