tracing: remove WatchEvent feature

content/browser/tracing/tracing_controller_impl.h

 // Copyright (c) 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 <stddef.h>
 #include <stdint.h>
 
@@ skipping 55 matching lines @@
 
   // TracingController implementation.
   bool GetCategories(const GetCategoriesDoneCallback& callback) override;
   bool StartTracing(const base::trace_event::TraceConfig& trace_config,
                     const StartTracingDoneCallback& callback) override;
   bool StopTracing(const scoped_refptr<TraceDataSink>& sink) override;
   bool GetTraceBufferUsage(
       const GetTraceBufferUsageCallback& callback) override;
   void AddMetadata(const base::DictionaryValue& metadata) override;
 
-  bool SetWatchEvent(const std::string& category_name,
-                     const std::string& event_name,
-                     const WatchEventCallback& callback) override;
-  bool CancelWatchEvent() override;
   bool IsTracing() const override;
 
   void RegisterTracingUI(TracingUI* tracing_ui);
   void UnregisterTracingUI(TracingUI* tracing_ui);
 
   // base::trace_event::TracingAgent implementation.
   std::string GetTracingAgentName() override;
   std::string GetTraceEventLabel() override;
   void StartAgentTracing(const base::trace_event::TraceConfig& trace_config,
                          const StartAgentTracingCallback& callback) override;
@@ skipping 47 matching lines @@
   }
 
   bool can_stop_monitoring() const {
     return is_monitoring_ && !monitoring_data_sink_.get();
   }
 
   bool can_get_trace_buffer_usage() const {
     return pending_trace_buffer_usage_callback_.is_null();
   }
 
-  bool can_cancel_watch_event() const {
-    return !watch_event_callback_.is_null();
-  }
-
   void PerformNextQueuedGlobalMemoryDump();
 
   // Methods for use by TraceMessageFilter.
   void AddTraceMessageFilter(TraceMessageFilter* trace_message_filter);
   void RemoveTraceMessageFilter(TraceMessageFilter* trace_message_filter);
 
   void OnTraceDataCollected(
       const scoped_refptr<base::RefCountedString>& events_str_ptr);
 
   // Callback of TraceLog::Flush() for the local trace.
@@ skipping 20 matching lines @@
                              const base::trace_event::TraceLogStatus& status);
   void OnProcessMemoryDumpResponse(TraceMessageFilter* trace_message_filter,
                                    uint64_t dump_guid,
                                    bool success);
 
   // Callback of MemoryDumpManager::CreateProcessDump().
   void OnBrowserProcessMemoryDumpDone(uint64_t dump_guid, bool success);
 
   void FinalizeGlobalMemoryDumpIfAllProcessesReplied();
 
-  void OnWatchEventMatched();
-
   void SetEnabledOnFileThread(
       const base::trace_event::TraceConfig& trace_config,
       int mode,
       const base::Closure& callback);
   void SetDisabledOnFileThread(const base::Closure& callback);
   void OnAllTracingAgentsStarted();
   void StopTracingAfterClockSync();
   void OnStopTracingDone();
 
   // Issue clock sync markers to the tracing agents.
@@ skipping 35 matching lines @@
   std::vector<base::trace_event::TracingAgent*> additional_tracing_agents_;
   int pending_clock_sync_ack_count_;
   base::OneShotTimer clock_sync_timer_;
 
   bool is_tracing_;
   bool is_monitoring_;
 
   GetCategoriesDoneCallback pending_get_categories_done_callback_;
   GetTraceBufferUsageCallback pending_trace_buffer_usage_callback_;
 
-  std::string watch_category_name_;
-  std::string watch_event_name_;
-  WatchEventCallback watch_event_callback_;
-
   base::ObserverList<TraceMessageFilterObserver>
       trace_message_filter_observers_;
 
   std::set<std::string> known_category_groups_;
   std::set<TracingUI*> tracing_uis_;
   scoped_refptr<TraceDataSink> trace_data_sink_;
   scoped_refptr<TraceDataSink> monitoring_data_sink_;
   std::unique_ptr<base::DictionaryValue> metadata_;
 
   DISALLOW_COPY_AND_ASSIGN(TracingControllerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_TRACING_TRACING_CONTROLLER_IMPL_H_