[Tracing Clock Sync] Add TracingAgent interface in Chrome

chromeos/dbus/fake_debug_daemon_client.h

Index: chromeos/dbus/fake_debug_daemon_client.h
diff --git a/chromeos/dbus/fake_debug_daemon_client.h b/chromeos/dbus/fake_debug_daemon_client.h
index 6f75e59fd5bdfa979b611e619c705b0813b1a287..66cc88e3402afc9824511a133717d08da7b9ba88 100644
--- a/chromeos/dbus/fake_debug_daemon_client.h
+++ b/chromeos/dbus/fake_debug_daemon_client.h
@@ -27,10 +27,12 @@ class CHROMEOS_EXPORT FakeDebugDaemonClient : public DebugDaemonClient {
                      const GetDebugLogsCallback& callback) override;
   void SetDebugMode(const std::string& subsystem,
                     const SetDebugModeCallback& callback) override;
-  void StartSystemTracing() override;
-  bool RequestStopSystemTracing(
-      scoped_refptr<base::TaskRunner> task_runner,
-      const StopSystemTracingCallback& callback) override;
+  std::string GetTracingAgentName() override;
+  bool StartAgentTracing(
+      const base::trace_event::TraceConfig& trace_config) override;
+  void StopAgentTracing(const StopAgentTracingCallback& callback) override;
+  void SetStopAgentTracingTaskRunner(
+      scoped_refptr<base::TaskRunner> task_runner) override;
   void GetRoutes(bool numeric,
                  bool ipv6,
                  const GetRoutesCallback& callback) override;