|  | // 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() {} | 
|  |  | 
|  | bool TracingAgent::SupportsExplicitClockSync() { | 
|  | return false; | 
|  | } | 
|  |  | 
|  | void TracingAgent::RecordClockSyncMarker( | 
|  | const std::string& sync_id, | 
|  | const RecordClockSyncMarkerCallback& callback) { | 
|  | DCHECK(SupportsExplicitClockSync()); | 
|  | } | 
|  |  | 
|  |  | 
|  | }  // namespace trace_event | 
|  | }  // namespace base |