Change WebRTC log callback registration in browser process.

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 5037893190a68f8ff118e95ee72b7e58a5e7935f..d3bf1527e7ba68110b3dbced7ac706981b53262e 100644
--- a/content/public/test/mock_render_process_host.cc
+++ b/content/public/test/mock_render_process_host.cc
@@ -312,8 +312,7 @@ void MockRenderProcessHost::EnableAudioDebugRecordings(
     const base::FilePath& file) {
 }
 
-void MockRenderProcessHost::DisableAudioDebugRecordings() {
-}
+void MockRenderProcessHost::DisableAudioDebugRecordings() {}
 
 void MockRenderProcessHost::EnableEventLogRecordings(
     const base::FilePath& file) {}
@@ -324,6 +323,8 @@ void MockRenderProcessHost::SetWebRtcLogMessageCallback(
     base::Callback<void(const std::string&)> callback) {
 }
 
+void MockRenderProcessHost::ClearWebRtcLogMessageCallback() {}
+
 RenderProcessHost::WebRtcStopRtpDumpCallback
 MockRenderProcessHost::StartRtpDump(
     bool incoming,