Re-enable keytype suppression for APM in the renderer process

The activation of the keytype suppression was by mistake removed in
Chrome for all calls running the processing in the renderer process.
The CL that caused this was
https://chromium-review.googlesource.com/c/chromium/src/+/1495528

This CL re-enables keytype suppression.

Bug: chromium:1033455
Change-Id: Ieaeafc53f2d4b0d8e87400544e859fd0e0e68886
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1984305Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Commit-Queue: Per Åhgren <peah@chromium.org>
Cr-Commit-Position: refs/heads/master@{#729943}

third_party/blink/renderer/modules/mediastream/media_stream_audio_processor.cc

@@ -522,6 +522,8 @@ void MediaStreamAudioProcessor::InitializeAudioProcessingModule(
 
   // Experimental options provided at creation.
   webrtc::Config config;
+  config.Set<webrtc::ExperimentalNs>(new webrtc::ExperimentalNs(
+      properties.goog_experimental_noise_suppression));
 
   // If the experimental AGC is enabled, check for overridden config params.
   if (properties.goog_experimental_auto_gain_control) {

third_party/blink/tools/blinkpy/presubmit/audit_non_blink_usage.py

@@ -750,6 +750,7 @@ _CONFIG = [
             'webrtc::EchoCanceller3Config',
             'webrtc::EchoCanceller3Factory',
             'webrtc::ExperimentalAgc',
+            'webrtc::ExperimentalNs',
             'webrtc::MediaStreamTrackInterface',
             'webrtc::ObserverInterface',
             'webrtc::StreamConfig',