Implements RTP header dumping.

content/public/test/mock_render_process_host.cc

Index: content/public/test/mock_render_process_host.cc
diff --git a/content/public/test/mock_render_process_host.cc b/content/public/test/mock_render_process_host.cc
index 50c19ee849d81fe6876e80482f353b4ed4ce8328..2f69fae72f62552792c79d169203a65feddc7c9f 100644
--- a/content/public/test/mock_render_process_host.cc
+++ b/content/public/test/mock_render_process_host.cc
@@ -237,6 +237,14 @@ void MockRenderProcessHost::DisableAecDump() {
 void MockRenderProcessHost::SetWebRtcLogMessageCallback(
     base::Callback<void(const std::string&)> callback) {
 }
+
+RenderProcessHost::WebRtcStopRtpDumpCallback
+MockRenderProcessHost::StartRtpDump(
+    bool incoming,
+    bool outgoing,
+    const WebRtcRtpPacketCallback& packet_callback) {
+  return WebRtcStopRtpDumpCallback();
+}
 #endif
 
 void MockRenderProcessHost::ResumeDeferredNavigation(