Privatize StrongBinding lifetime management

media/mojo/services/mojo_video_decoder_service.cc

Index: media/mojo/services/mojo_video_decoder_service.cc
diff --git a/media/mojo/services/mojo_video_decoder_service.cc b/media/mojo/services/mojo_video_decoder_service.cc
index 84a41d5e7bae05ac17f764fb92bda7a2e4c178f1..0c43a589c204aa4e951d8056b2d71c711e7bf03e 100644
--- a/media/mojo/services/mojo_video_decoder_service.cc
+++ b/media/mojo/services/mojo_video_decoder_service.cc
@@ -22,11 +22,8 @@
 namespace media {
 
 MojoVideoDecoderService::MojoVideoDecoderService(
-    mojo::InterfaceRequest<mojom::VideoDecoder> request,
     MojoMediaClient* mojo_media_client)
-    : binding_(this, std::move(request)),
-      mojo_media_client_(mojo_media_client),
-      weak_factory_(this) {
+    : mojo_media_client_(mojo_media_client), weak_factory_(this) {
   weak_this_ = weak_factory_.GetWeakPtr();
 }