Convert startup_metric_utils to use mojo.

components/startup_metric_utils/browser/startup_metric_host_impl.cc

+// 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