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

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
diff --git a/content/browser/renderer_host/render_process_host_impl.cc b/content/browser/renderer_host/render_process_host_impl.cc
index c52d5cfe7f2a173f8df9836a47cbac85943d4758..46951540bd69f3af23b87dee7665612e4c671aa7 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -73,7 +73,6 @@
 #include "content/browser/renderer_host/media/audio_mirroring_manager.h"
 #include "content/browser/renderer_host/media/audio_renderer_host.h"
 #include "content/browser/renderer_host/media/media_stream_dispatcher_host.h"
-#include "content/browser/renderer_host/media/peer_connection_tracker_host.h"
 #include "content/browser/renderer_host/media/video_capture_host.h"
 #include "content/browser/renderer_host/memory_benchmark_message_filter.h"
 #include "content/browser/renderer_host/p2p/socket_dispatcher_host.h"
@@ -136,6 +135,11 @@
 #include "content/public/common/sandboxed_process_launcher_delegate.h"
 #endif
 
+#if defined(ENABLE_WEBRTC)
+#include "content/browser/renderer_host/media/peer_connection_tracker_host.h"
+#include "content/browser/renderer_host/media/webrtc_identity_service_host.h"
+#endif
+
 #include "third_party/skia/include/core/SkBitmap.h"
 
 extern bool g_exited_main_message_loop;
@@ -642,6 +646,8 @@ void RenderProcessHostImpl::CreateMessageFilters() {
   gpu_message_filter_ = new GpuMessageFilter(GetID(), widget_helper_.get());
   channel_->AddFilter(gpu_message_filter_);
 #if defined(ENABLE_WEBRTC)
+  channel_->AddFilter(new WebRTCIdentityServiceHost(
+      storage_partition_impl_->GetWebRTCIdentityStore()));
   peer_connection_tracker_host_ = new PeerConnectionTrackerHost(GetID());
   channel_->AddFilter(peer_connection_tracker_host_.get());
   channel_->AddFilter(new MediaStreamDispatcherHost(GetID()));