Create a private API for controlling WebRTC's AEC3

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 ede70ada11303dfea53c00bb16ed53491a313293..a635ecaacc1cb6c1485c7e99537d206eefd485d3 100644
--- a/content/browser/renderer_host/render_process_host_impl.cc
+++ b/content/browser/renderer_host/render_process_host_impl.cc
@@ -2343,6 +2343,17 @@ bool RenderProcessHostImpl::StopWebRTCEventLog() {
   return webrtc_eventlog_host_.StopWebRTCEventLog();
 }
 
+void RenderProcessHostImpl::SetEchoCanceller3(bool enable) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+
+  // Piggybacking on AEC dumps.
+  // TODO(hlundin) Consider changing name for aec_dump_consumers_.

[Henrik Grunell, 2017/04/10 08:13:28]

I think this should be done. I'm OK with a follow-up CL. Can you file a bug to
track?

[hlundin-chromium, 2017/04/10 10:10:16]

Done.

+  for (std::vector<int>::iterator it = aec_dump_consumers_.begin();
+       it != aec_dump_consumers_.end(); ++it) {
+    SetEchoCanceller3ForId(enable, *it);

[Henrik Grunell, 2017/04/10 08:13:28]

Just do

Send(new AudioProcessingMsg_EnableAec3(id, enable));

here and remove SetEchoCanceller3ForId().

[hlundin-chromium, 2017/04/10 10:10:16]

Done.

+  }
+}
+
 void RenderProcessHostImpl::SetWebRtcLogMessageCallback(
     base::Callback<void(const std::string&)> callback) {
 #if BUILDFLAG(ENABLE_WEBRTC)
@@ -3036,6 +3047,11 @@ base::FilePath RenderProcessHostImpl::GetAecDumpFilePathWithExtensions(
   return file.AddExtension(IntToStringType(base::GetProcId(GetHandle())))
       .AddExtension(kAecDumpFileNameAddition);
 }
+
+void RenderProcessHostImpl::SetEchoCanceller3ForId(bool enable, int id) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  Send(new AudioProcessingMsg_EnableAec3(id, enable));
+}
 #endif  // BUILDFLAG(ENABLE_WEBRTC)
 
 void RenderProcessHostImpl::GetAudioOutputControllers(