Adds a callback to TracingAgent::StartAgentTracing()

chromeos/dbus/fake_debug_daemon_client.cc

 // Copyright 2013 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 "chromeos/dbus/fake_debug_daemon_client.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
@@ skipping 39 matching lines @@
 }
 
 std::string FakeDebugDaemonClient::GetTracingAgentName() {
   return kCrOSTracingAgentName;
 }
 
 std::string FakeDebugDaemonClient::GetTraceEventLabel() {
   return kCrOSTraceLabel;
 }
 
-bool FakeDebugDaemonClient::StartAgentTracing(
-    const base::trace_event::TraceConfig& trace_config) {
-  return true;
+void FakeDebugDaemonClient::StartAgentTracing(
+    const base::trace_event::TraceConfig& trace_config,
+    const StartAgentTracingCallback& callback) {
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
+      FROM_HERE,
+      base::Bind(callback, GetTracingAgentName(), true /* success */));
 }
 
 void FakeDebugDaemonClient::StopAgentTracing(
     const StopAgentTracingCallback& callback) {
   std::string no_data;
   callback.Run(GetTracingAgentName(), GetTraceEventLabel(),
                base::RefCountedString::TakeString(&no_data));
 }
 
 void FakeDebugDaemonClient::SetStopAgentTracingTaskRunner(
@@ skipping 126 matching lines @@
   if (!is_available)
     return;
 
   std::vector<WaitForServiceToBeAvailableCallback> callbacks;
   callbacks.swap(pending_wait_for_service_to_be_available_callbacks_);
   for (size_t i = 0; i < callbacks.size(); ++i)
     callbacks[i].Run(is_available);
 }
 
 }  // namespace chromeos