Implement Ukm Mojo interface.

components/ukm/ukm_interface.h

+// Copyright 2017 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_UKM_UKM_INTERFACE_H_
+#define COMPONENTS_UKM_UKM_INTERFACE_H_
+
+#include "components/ukm/public/interfaces/ukm_interface.mojom.h"
+
+namespace service_manager {
+struct BindSourceInfo;
+}
+
+namespace ukm {
+
+class UkmRecorder;
+
+class UkmInterface : public mojom::UkmRecorderInterface {
+ public:
+  explicit UkmInterface(UkmRecorder* ukm_recorder);
+  ~UkmInterface() override;
+
+  static void Create(UkmRecorder* ukm_recorder,
+                     const service_manager::BindSourceInfo& source_info,
+                     mojom::UkmRecorderInterfaceRequest request);
+
+ private:
+  // ukm::mojom::UkmRecorderInterface:
+  void AddEntry(mojom::UkmEntryPtr entry) override;
+
+  UkmRecorder* ukm_recorder_;
+
+  DISALLOW_COPY_AND_ASSIGN(UkmInterface);
+};
+
+}  // namespace ukm
+
+#endif  // COMPONENTS_UKM_UKM_INTERFACE_H_