Revert of Convert startup_metric_utils to use mojo.

components/startup_metric_utils/browser/startup_metric_host_impl.cc

Index: components/startup_metric_utils/browser/startup_metric_host_impl.cc
diff --git a/components/startup_metric_utils/browser/startup_metric_host_impl.cc b/components/startup_metric_utils/browser/startup_metric_host_impl.cc
deleted file mode 100644
index 055fec803545bfd8dda09c75d814111890598ad3..0000000000000000000000000000000000000000
--- a/components/startup_metric_utils/browser/startup_metric_host_impl.cc
+++ /dev/null
@@ -1,26 +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.
-
-#include "components/startup_metric_utils/browser/startup_metric_host_impl.h"
-
-#include "components/startup_metric_utils/browser/startup_metric_utils.h"
-
-namespace startup_metric_utils {
-// static
-void StartupMetricHostImpl::Create(mojom::StartupMetricHostRequest request) {
-  new StartupMetricHostImpl(std::move(request));
-}
-
-StartupMetricHostImpl::StartupMetricHostImpl(
-    mojom::StartupMetricHostRequest request)
-    : binding_(this, std::move(request)) {}
-
-StartupMetricHostImpl::~StartupMetricHostImpl() = default;
-
-void StartupMetricHostImpl::RecordRendererMainEntryTime(
-    const base::TimeTicks& renderer_main_entry_time) {
-  startup_metric_utils::RecordRendererMainEntryTime(renderer_main_entry_time);
-}
-
-}  // namespace startup_metric_utils