Make the fuchsia mojo/public repo the source of truth.

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.
-
-[DartPackage="mojo",
- JavaPackage="org.chromium.mojo.bindings"]
-module mojo;
-
-// For each message pipe representing a user-defined interface, some control
-// functions are provided at the same end of the message pipe as the
-// user-defined interface, providing information about the user-defined
-// interface and controlling behavior of the message pipe.
-
-////////////////////////////////////////////////////////////////////////////////
-// Run@0xFFFFFFFF(RunInput input) => (RunOutput? output);
-//
-// This control function runs the input command. If the command is not
-// supported, |output| is set to null; otherwise |output| stores the result,
-// whose type depends on the input.
-//
-// TODO(yzshen): Once union support is ready, switch the following definition
-// to:
-// struct RunMessageParams {
-//   RunInput input;
-// };
-// union RunInput {
-//   QueryVersion query_version;
-// };
-//
-// struct RunResponseMessageParams {
-//   RunOutput? output;
-// };
-// union RunOutput {
-//   QueryVersionResult query_version_result;
-// };
-
-const uint32 kRunMessageId = 0xFFFFFFFF;
-
-struct RunMessageParams {
-  // The reserved fields make the layout compatible with the RunInput union
-  // described above.
-  uint32 reserved0;  // Must be set to 16.
-  uint32 reserved1;  // Must be set to 0;
-  QueryVersion query_version;
-};
-
-struct RunResponseMessageParams {
-  // The reserved fields make the layout compatible with the RunOutput union
-  // described above.
-  uint32 reserved0;  // Must be set to 16.
-  uint32 reserved1;  // Must be set to 0.
-  QueryVersionResult query_version_result;
-};
-
-// Queries the max supported version of the user-defined interface.
-struct QueryVersion {};
-struct QueryVersionResult {
-  uint32 version;
-};
-
-////////////////////////////////////////////////////////////////////////////////
-// RunOrClosePipe@0xFFFFFFFE(RunOrClosePipeInput input);
-//
-// This control function runs the input command. If the operation fails or the
-// command is not supported, the message pipe is closed.
-//
-// TODO(yzshen): Once union support is ready, switch the following definition
-// to:
-// struct RunOrClosePipeMessageParams {
-//   RunOrClosePipeInput input;
-// };
-// union RunOrClosePipeInput {
-//   RequireVersion require_version;
-// };
-
-const uint32 kRunOrClosePipeMessageId = 0xFFFFFFFE;
-
-struct RunOrClosePipeMessageParams {
-  // The reserved fields make the layout compatible with the RunOrClosePipeInput
-  // union described above.
-  uint32 reserved0;  // Must be set to 16.
-  uint32 reserved1;  // Must be set to 0.
-  RequireVersion require_version;
-};
-
-// If the specified version of the user-defined interface is not supported, the
-// function fails and the pipe is closed.
-struct RequireVersion {
-  uint32 version;
-};