Rename ServiceProvider to InterfaceProvider.

mojo/shell/public/interfaces/interface_provider.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;
+
+// An interface through which a client may request interfaces from a host.
+// Instances of this interface are created within the context of an
+// already-identified client and host pair, so there is no need to explicitly
+// identify the client or host in the methods below.
+interface InterfaceProvider {
+  // Asks the host to provide an implementation of the interface identified by
+  // |interface_name| through the message |pipe| endpoint supplied by the caller.
+  // If the host is not willing or able to provide the requested interface, it
+  // must close the |pipe|.
+  GetInterface(string interface_name, handle<message_pipe> pipe);
+};