Sampling profiling thread should be joined in a FILE thread

content/browser/tracing/tracing_controller_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_TRACING_TRACING_CONTROLLER_IMPL_H_
 #define CONTENT_BROWSER_TRACING_TRACING_CONTROLLER_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 99 matching lines @@
       const std::vector<std::string>& known_category_groups);
   void OnResultFileClosed();
 
   void OnCaptureMonitoringSnapshotAcked();
   void OnMonitoringSnapshotFileClosed();
 
   void OnTraceBufferPercentFullReply(float percent_full);
 
   void OnWatchEventMatched();
 
+  void SetEnabled(const std::string& category_filter,
+                  int options,
+                  const base::Closure& callback);
+  void SetDisabled(const base::Closure& callback);
+  void OnEnableRecordingDone(const std::string& category_filter,
+                             int trace_options,
+                             const EnableRecordingDoneCallback& callback);
+  void OnDisableRecordingDone(const base::FilePath& result_file_path,
+                              const TracingFileResultCallback& callback);
+  void OnEnableMonitoringDone(const std::string& category_filter,
+                              int trace_options,
+                              const EnableMonitoringDoneCallback& callback);
+  void OnDisableMonitoringDone(const DisableMonitoringDoneCallback& callback);
+
   TraceMessageFilterMap trace_message_filters_;
   // Pending acks for DisableRecording.
   int pending_disable_recording_ack_count_;
   // Pending acks for CaptureMonitoringSnapshot.
   int pending_capture_monitoring_snapshot_ack_count_;
   // Pending acks for GetTraceBufferPercentFull.
   int pending_trace_buffer_percent_full_ack_count_;
   float maximum_trace_buffer_percent_full_;
 
   bool is_recording_;
@@ skipping 10 matching lines @@
 
   std::set<std::string> known_category_groups_;
   scoped_ptr<ResultFile> result_file_;
   scoped_ptr<ResultFile> monitoring_snapshot_file_;
   DISALLOW_COPY_AND_ASSIGN(TracingControllerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_TRACING_TRACING_CONTROLLER_IMPL_H_