Add 'flog' service implementation.

services/flog/flog_logger_impl.h

+// Copyright 2016 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 MOJO_SERVICES_FLOG_FLOG_LOGGER_IMPL_H_
+#define MOJO_SERVICES_FLOG_FLOG_LOGGER_IMPL_H_
+
+#include <memory>
+#include <vector>
+
+#include "mojo/public/cpp/bindings/binding.h"
+#include "services/flog/flog_directory.h"
+#include "services/flog/flog_service_impl.h"
+
+namespace mojo {
+namespace flog {
+
+// FlogLogger implementation.
+class FlogLoggerImpl : public FlogServiceImpl::ProductBase,
+                       MessageReceiverWithResponderStatus {
+ public:
+  static std::shared_ptr<FlogLoggerImpl> Create(
+      InterfaceRequest<FlogLogger> request,
+      uint32_t log_id,
+      const std::string& label,
+      std::shared_ptr<FlogDirectory> directory,
+      FlogServiceImpl* owner);
+
+  ~FlogLoggerImpl() override;
+
+  // MessageReceiverWithResponderStatus implementation.
+  bool Accept(Message* message) override;
+
+  bool AcceptWithResponder(Message* message,
+                           MessageReceiverWithStatus* responder) override;
+
+ private:
+  FlogLoggerImpl(InterfaceRequest<FlogLogger> request,
+                 uint32_t log_id,
+                 const std::string& label,
+                 std::shared_ptr<FlogDirectory> directory,
+                 FlogServiceImpl* owner);
+
+  void WriteData(uint32_t data_size, const void* data);
+
+  std::unique_ptr<mojo::internal::Router> router_;
+  files::FilePtr file_;
+};
+
+}  // namespace flog
+}  // namespace mojo
+
+#endif  // MOJO_SERVICES_FLOG_FLOG_LOGGER_IMPL_H_