WIP: The tracing service prototype

services/resource_coordinator/public/cpp/tracing/chrome_agent.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 SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_TRACING_CHROME_AGENT_H_
+#define SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_TRACING_CHROME_AGENT_H_
+
+#include "base/callback.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/ref_counted_memory.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "services/resource_coordinator/public/cpp/resource_coordinator_export.h"
+#include "services/resource_coordinator/public/interfaces/tracing/tracing.mojom.h"
+#include "services/service_manager/public/cpp/connector.h"
+
+namespace resource_coordinator {
+namespace tracing {
+
+class SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_EXPORT ChromeAgent
+    : public mojom::Agent {
+ public:
+  static void InitializeIfNeeded(mojom::AgentSetPtr agent_set);
+
+ private:
+  explicit ChromeAgent(mojom::AgentSetPtr agent_set);
+  ~ChromeAgent() override;
+
+  static void BindAgentSetRequest(service_manager::Connector* connector,
+                                  const std::string& name,
+                                  mojom::AgentSetRequest request);
+
+  // mojom::Agent
+  void StartTracing(const std::string& config,
+                    mojom::RecorderPtr recorder,
+                    bool report_categories_only,
+                    const StartTracingCallback& callback) override;
+  void StopAndFlush() override;
+  void RequestClockSyncMarker(
+      const std::string& sync_id,
+      const RequestClockSyncMarkerCallback& callback) override;
+  void RequestBufferStatus(
+      const RequestBufferStatusCallback& callback) override;
+
+  void SendChunk(const scoped_refptr<base::RefCountedString>& events_str,
+                 bool has_more_events);
+
+  mojom::AgentSetPtr agent_set_;
+  mojo::Binding<mojom::Agent> binding_;
+  mojom::RecorderPtr recorder_;
+  bool report_categories_only_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromeAgent);
+};
+
+}  // namespace tracing
+}  // namespace resource_coordinator
+#endif  // SERVICES_RESOURCE_COORDINATOR_PUBLIC_CPP_TRACING_CHROME_AGENT_H_