Implement sampling profiler (chromium side change)

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 104 matching lines @@
       TraceMessageFilter* trace_message_filter);
   void OnMonitoringSnapshotFileClosed();
 
   void OnTraceBufferPercentFullReply(
       TraceMessageFilter* trace_message_filter,
       float percent_full);
 
   void OnWatchEventMatched();
 
   void SetEnabledOnFileThread(const std::string& category_filter,
+                              int mode,
                               int options,
                               const base::Closure& callback);
   void SetDisabledOnFileThread(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,
@@ skipping 27 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_