| // 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. | 
 |  | 
 | #include "base/trace_event/tracing_agent.h" | 
 |  | 
 | namespace base { | 
 | namespace trace_event { | 
 |  | 
 | TracingAgent::~TracingAgent() = default; | 
 |  | 
 | bool TracingAgent::SupportsExplicitClockSync() { | 
 |   return false; | 
 | } | 
 |  | 
 | void TracingAgent::RecordClockSyncMarker( | 
 |     const std::string& sync_id, | 
 |     RecordClockSyncMarkerCallback callback) { | 
 |   DCHECK(SupportsExplicitClockSync()); | 
 | } | 
 |  | 
 |  | 
 | }  // namespace trace_event | 
 | }  // namespace base |