Convert startup_metric_utils to use mojo.

components/startup_metric_utils/common/startup_metric_message_generator.cc

Index: components/startup_metric_utils/common/startup_metric_message_generator.cc
diff --git a/components/startup_metric_utils/common/startup_metric_message_generator.cc b/components/startup_metric_utils/common/startup_metric_message_generator.cc
deleted file mode 100644
index 5a9f19a6f85d5ca80affcb15aed38a498c440c7d..0000000000000000000000000000000000000000
--- a/components/startup_metric_utils/common/startup_metric_message_generator.cc
+++ /dev/null
@@ -1,39 +0,0 @@
-// 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.
-
-// Get basic type definitions.
-#define IPC_MESSAGE_IMPL
-#include "components/startup_metric_utils/common/startup_metric_message_generator.h"
-
-// Generate constructors.
-#include "ipc/struct_constructor_macros.h"
-#include "components/startup_metric_utils/common/startup_metric_message_generator.h"
-
-// Generate destructors.
-#include "ipc/struct_destructor_macros.h"
-#include "components/startup_metric_utils/common/startup_metric_message_generator.h"
-
-// Generate param traits size methods.
-#include "ipc/param_traits_size_macros.h"
-namespace IPC {
-#include "components/startup_metric_utils/common/startup_metric_message_generator.h"
-}  // namespace IPC
-
-// Generate param traits write methods.
-#include "ipc/param_traits_write_macros.h"
-namespace IPC {
-#include "components/startup_metric_utils/common/startup_metric_message_generator.h"
-}  // namespace IPC
-
-// Generate param traits read methods.
-#include "ipc/param_traits_read_macros.h"
-namespace IPC {
-#include "components/startup_metric_utils/common/startup_metric_message_generator.h"
-}  // namespace IPC
-
-// Generate param traits log methods.
-#include "ipc/param_traits_log_macros.h"
-namespace IPC {
-#include "components/startup_metric_utils/common/startup_metric_message_generator.h"
-}  // namespace IPC