Convert startup_metric_utils to use mojo.

components/startup_metric_utils/browser/startup_metric_host_impl.h

Index: components/startup_metric_utils/browser/startup_metric_host_impl.h
diff --git a/components/startup_metric_utils/browser/startup_metric_host_impl.h b/components/startup_metric_utils/browser/startup_metric_host_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..cf903f37139b3e8880744f0ee677888445330d8b
--- /dev/null
+++ b/components/startup_metric_utils/browser/startup_metric_host_impl.h
@@ -0,0 +1,35 @@
+// 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.
+
+#ifndef COMPONENTS_STARTUP_METRIC_UTILS_BROWSER_STARTUP_METRIC_HOST_IMPL_H_
+#define COMPONENTS_STARTUP_METRIC_UTILS_BROWSER_STARTUP_METRIC_HOST_IMPL_H_
+
+#include <stdint.h>
+
+#include "base/macros.h"
+#include "base/time/time.h"
+#include "components/startup_metric_utils/common/startup_metric.mojom.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+
+namespace startup_metric_utils {
+
+class StartupMetricHostImpl : public mojom::StartupMetricHost {
+ public:
+  static void Create(mojom::StartupMetricHostRequest request);
+
+ private:
+  explicit StartupMetricHostImpl(mojom::StartupMetricHostRequest request);
+  ~StartupMetricHostImpl() override;
+
+  void RecordRendererMainEntryTime(
+      const base::TimeTicks& renderer_main_entry_time) override;
+
+  mojo::StrongBinding<mojom::StartupMetricHost> binding_;
+
+  DISALLOW_COPY_AND_ASSIGN(StartupMetricHostImpl);
+};
+
+}  // namespace startup_metric_utils
+
+#endif  // COMPONENTS_STARTUP_METRIC_UTILS_BROWSER_STARTUP_METRIC_HOST_IMPL_H_