SendBeginTracing   28 content/browser/tracing/trace_message_filter.h   void SendBeginTracing(const std::string& category_filter_str,
SendBeginTracing  286 content/browser/tracing/tracing_controller_impl.cc     it->get()->SendBeginTracing(category_filter,
SendBeginTracing  578 content/browser/tracing/tracing_controller_impl.cc     trace_message_filter->SendBeginTracing(