Implement GetUserMedia device ID constraint processing in the renderer.

content/renderer/media/user_media_client_impl.h

Index: content/renderer/media/user_media_client_impl.h
diff --git a/content/renderer/media/user_media_client_impl.h b/content/renderer/media/user_media_client_impl.h
index e9202d63f8b38d1b7c4ac2717e216c614597b458..2492ccc00bebd8fc887990a2b46527f765a0e549 100644
--- a/content/renderer/media/user_media_client_impl.h
+++ b/content/renderer/media/user_media_client_impl.h
@@ -242,6 +242,20 @@ class CONTENT_EXPORT UserMediaClientImpl
 
   const ::mojom::MediaDevicesDispatcherHostPtr& GetMediaDevicesDispatcher();
 
+  void SelectUserMediaDevice(
+      int request_id,
+      const blink::WebUserMediaRequest& user_media_request,
+      std::unique_ptr<StreamControls> controls,
+      bool enable_automatic_output_device_selection,
+      const url::Origin& security_origin,
+      const EnumerationResult& device_enumeration);
+  void FinalizeRequestUserMedia(
+      int request_id,
+      const blink::WebUserMediaRequest& user_media_request,
+      std::unique_ptr<StreamControls> controls,
+      bool enable_automatic_output_device_selection,
+      const url::Origin& security_origin);
+
   // Callback invoked by MediaDevicesEventDispatcher when a device-change
   // notification arrives.
   void DevicesChanged(MediaDeviceType device_type,