media: Use mojo::StrongBinding in mojo media services.

content/browser/frame_host/render_frame_host_impl.cc

Index: content/browser/frame_host/render_frame_host_impl.cc
diff --git a/content/browser/frame_host/render_frame_host_impl.cc b/content/browser/frame_host/render_frame_host_impl.cc
index 935a9cf3a16031b0946842d400212f0beab740f6..2fd66b5e21463192e2d04d937f144b76e2e459d0 100644
--- a/content/browser/frame_host/render_frame_host_impl.cc
+++ b/content/browser/frame_host/render_frame_host_impl.cc
@@ -1521,8 +1521,8 @@ void RenderFrameHostImpl::OnHidePopup() {
 #if defined(ENABLE_MEDIA_MOJO_RENDERER)
 static void CreateMediaRendererService(
     mojo::InterfaceRequest<mojo::MediaRenderer> request) {
-  media::MojoRendererService* service = new media::MojoRendererService();
-  mojo::BindToRequest(service, &request);
+  // The created object is owned by the pipe.
+  new media::MojoRendererService(request.Pass());
 }
 #endif