libmojo: Uprev the library to r456626 from Chromium

Pulled the latest and greatest version of libmojo from Chromium.

The merge was done against r456626 which corresponds to git commit
08266b3fca707804065a2cfd60331722ade41969 of Mar 14, 2017

Notable changes are:
- generated binding files are now split in 2 files, interface.mojom.h
  and interface.mojom-shared.h

Change-Id: Idcfd27310e2c9d3c452b671c7ff7a755c3963618

1 files changed, 21 insertions, 0 deletions

diff --git a/mojo/public/cpp/bindings/connection_error_callback.h b/mojo/public/cpp/bindings/connection_error_callback.h
new file mode 100644
index 0000000..306e99e
--- /dev/null
+++ b/mojo/public/cpp/bindings/connection_error_callback.h
@@ -0,0 +1,21 @@
+// Copyright 2016 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.
+
+#ifndef MOJO_PUBLIC_CPP_BINDINGS_CONNECTION_ERROR_CALLBACK_H_
+#define MOJO_PUBLIC_CPP_BINDINGS_CONNECTION_ERROR_CALLBACK_H_
+
+#include "base/callback.h"
+
+namespace mojo {
+
+// This callback type accepts user-defined disconnect reason and description. If
+// the other side specifies a reason on closing the connection, it will be
+// passed to the error handler.
+using ConnectionErrorWithReasonCallback =
+    base::Callback<void(uint32_t /* custom_reason */,
+                        const std::string& /* description */)>;
+
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_BINDINGS_CONNECTION_ERROR_CALLBACK_H_