Move InterfaceProvider into the shell::mojom namespace like the rest of the shell interfaces.

mojo/shell/public/interfaces/shell_client.mojom

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 module mojo.shell.mojom;
 
 import "mojo/shell/public/interfaces/interface_provider.mojom";
 import "mojo/shell/public/interfaces/shell.mojom";
 
 // TODO(beng): rewrite these comments.
@@ skipping 46 matching lines @@
   // no services to the connecting application. When this parameter contains
   // only the single string value "*" the application may expose all of its
   // services to the connecting application.
   //
   // |resolved_url| is the URL that was requested to create this connection,
   // after all mappings, resolutions, and redirects. This will include any
   // querystring that was part of the request.
   //
   AcceptConnection(string requestor_url,
                    uint32 requestor_id,
-                   mojo.InterfaceProvider&? local_interfaces,
-                   mojo.InterfaceProvider? remote_interfaces,
+                   InterfaceProvider&? local_interfaces,
+                   InterfaceProvider? remote_interfaces,
                    array<string> allowed_interfaces,
                    string resolved_url);
 
   // Called by the shell in response to calling Shell's QuitApplication. The
   // application should run the callback with true if shutdown can proceed.
   // See Shell::QuitApplication for details about shutdown workflow.
   OnQuitRequested() => (bool can_quit);
 };