Move shell service to toplevel shell namespace

media/mojo/services/mojo_media_client.cc

Index: media/mojo/services/mojo_media_client.cc
diff --git a/media/mojo/services/mojo_media_client.cc b/media/mojo/services/mojo_media_client.cc
index 8f30ec0fd613ad6db2c783920f986370b4f1a8c4..2d81841b7db932c96c9c15360f12276478c5cf0a 100644
--- a/media/mojo/services/mojo_media_client.cc
+++ b/media/mojo/services/mojo_media_client.cc
@@ -32,7 +32,7 @@ VideoRendererSink* MojoMediaClient::CreateVideoRendererSink(
 }
 
 std::unique_ptr<CdmFactory> MojoMediaClient::CreateCdmFactory(
-    mojo::shell::mojom::InterfaceProvider* interface_provider) {
+    shell::mojom::InterfaceProvider* interface_provider) {
   return nullptr;
 }