We are leaking these 2 bindings (media::mojom::RemoterFactory and media::mojom::Remoter). I did this change to disable media remoting and this specific leak seems to go away. We have many other leaks though but these are tracked in the master issue 676187.

diff --git a/media/media_options.gni b/media/media_options.gni
index 3aab0a04970f..04cbeff6ec27 100644
--- a/media/media_options.gni
+++ b/media/media_options.gni
@@ -142,5 +142,5 @@ declare_args() {
   # This switch defines whether the Media Remoting implementation will be built.
   # When enabled, media is allowed to be renderer and played back on remote
   # devices when the tab is being casted and other conditions are met.
-  enable_media_remoting = !is_chromecast && !is_ios && !is_android
+  enable_media_remoting = false
 }