Add ability to bind a different InterfaceRegistry/InterfaceProvider to an incoming Connection.

services/shell/public/cpp/shell_client.h

Index: services/shell/public/cpp/shell_client.h
diff --git a/services/shell/public/cpp/shell_client.h b/services/shell/public/cpp/shell_client.h
index d9513b76e108e3454d445e331cc4e8d558d6d976..ac2091a083ec051942e0afd7c0dd728eafd0bf10 100644
--- a/services/shell/public/cpp/shell_client.h
+++ b/services/shell/public/cpp/shell_client.h
@@ -35,6 +35,9 @@ class ShellClient {
                           const Identity& identity,
                           uint32_t id);
 
+  virtual InterfaceProvider* GetInterfaceProviderForConnection();
+  virtual InterfaceRegistry* GetInterfaceRegistryForConnection();
+
   // Called when a connection to this client is brokered by the shell. Override
   // to expose services to the remote application. Return true if the connection
   // should succeed. Return false if the connection should be rejected and the