Fix for chromeRenderToAssociatedSink optional constraint calculation.

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 15e096b6469d9b1bc061d68be7d41c99bb18666c..16d1427bb0cc4c4eaf4337c695d05350d8076bb3 100644
--- a/content/renderer/media/user_media_client_impl.cc
+++ b/content/renderer/media/user_media_client_impl.cc
@@ -179,10 +179,14 @@ void UserMediaClientImpl::requestUserMedia(
       controls.audio.requested = true;
       // Check if this input device should be used to select a matching output
       // device for audio rendering.
-      if (!user_media_request.audioConstraints()
-               .basic()
-               .renderToAssociatedSink.matches(false)) {
-        enable_automatic_output_device_selection = true;
+      enable_automatic_output_device_selection = true;  // On by default.
+      for (const auto& advanced_constraint :
+           user_media_request.audioConstraints().advanced()) {
+        if (advanced_constraint.renderToAssociatedSink.hasExact()) {
+          enable_automatic_output_device_selection =
+              advanced_constraint.renderToAssociatedSink.exact();
+          break;
+        }
       }
     }
     if (user_media_request.video()) {