Mojo: Add the IInterfaceProvider interface.

mojo/public/interfaces/interface_provider/interface_provider.mojom

Index: mojo/public/interfaces/interface_provider/interface_provider.mojom
diff --git a/mojo/public/interfaces/interface_provider/interface_provider.mojom b/mojo/public/interfaces/interface_provider/interface_provider.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..91e32813da65f7b597050d785da8cda4c39da5e2
--- /dev/null
+++ b/mojo/public/interfaces/interface_provider/interface_provider.mojom
@@ -0,0 +1,12 @@
+// 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 {
+
+[Client=IInterfaceProvider]
+interface IInterfaceProvider {
+  GetInterface(string name, handle<message_pipe> client_handle);
+};
+
+}