Support the googNoiseReduction constraint in SelectSettings for video-device capture.

content/renderer/media/user_media_client_impl.cc

Index: content/renderer/media/user_media_client_impl.cc
diff --git a/content/renderer/media/user_media_client_impl.cc b/content/renderer/media/user_media_client_impl.cc
index d8cc904fc1f0e9cd3680f0c62be5429582d8dd1a..439e0afa30b00295e8b8cb57191099fc6ff3cd8b 100644
--- a/content/renderer/media/user_media_client_impl.cc
+++ b/content/renderer/media/user_media_client_impl.cc
@@ -372,6 +372,9 @@ void UserMediaClientImpl::SelectVideoDeviceSourceSettings(
       media::PowerLineFrequency::FREQUENCY_DEFAULT,
       media::PowerLineFrequency::FREQUENCY_50HZ,
       media::PowerLineFrequency::FREQUENCY_60HZ};
+  capabilities.noise_reduction_capabilities = {rtc::Optional<bool>(),
+                                               rtc::Optional<bool>(true),
+                                               rtc::Optional<bool>(false)};
 
   base::PostTaskAndReplyWithResult(
       worker_task_runner_.get(), FROM_HERE,