Mojo bindings: merge the control messages of sending disconnect reason and notifying endpoint close…

mojo/public/interfaces/bindings/interface_control_messages.mojom

 // Copyright 2015 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.
 
 [JavaPackage="org.chromium.mojo.bindings.interfacecontrol"]
 module mojo.interface_control;
 
 // For each user-defined interface, some control functions are provided by the
 // interface endpoints at both sides.
 
@@ skipping 39 matching lines @@
 // This control function runs the input command. If the operation fails or the
 // command is not supported, the message pipe is closed.
 
 const uint32 kRunOrClosePipeMessageId = 0xFFFFFFFE;
 
 struct RunOrClosePipeMessageParams {
   RunOrClosePipeInput input;
 };
 union RunOrClosePipeInput {
   RequireVersion require_version;
-  SendDisconnectReason send_disconnect_reason;
 };
 
 // If the specified version of the user-defined interface is not supported, the
 // function fails and the pipe is closed.
 // Sent by the interface client side.
 struct RequireVersion {
   uint32 version;
 };
-
-// A user-defined reason about why the interface is disconnected. The sender
-// usually send this message and immediately disconnect the interface.
-// Sent by either side of the interface.
-struct SendDisconnectReason {
-  uint32 custom_reason;
-  string description;
-};