WIP: The tracing service prototype

content/browser/tracing/trace_message_filter.h

 // Copyright (c) 2012 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_TRACE_MESSAGE_FILTER_H_
 #define CONTENT_BROWSER_TRACING_TRACE_MESSAGE_FILTER_H_
 
 #include <stdint.h>
 
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/trace_event/trace_event.h"
 #include "content/public/browser/browser_message_filter.h"
 
 namespace content {
 
 // This class sends and receives trace messages on the browser process.
 // See also: tracing_controller.h
 // See also: child_trace_message_filter.h
 class TraceMessageFilter : public BrowserMessageFilter {
  public:
   explicit TraceMessageFilter(int child_process_id);
 
   // BrowserMessageFilter implementation.
-  void OnChannelClosing() override;
   bool OnMessageReceived(const IPC::Message& message) override;
 
-  void SendBeginTracing(
-      const base::trace_event::TraceConfig& trace_config);
-  void SendEndTracing();
-  void SendCancelTracing();
-  void SendGetTraceLogStatus();
-  void SendSetWatchEvent(const std::string& category_name,
-                         const std::string& event_name);
-  void SendCancelWatchEvent();
-
  protected:
   ~TraceMessageFilter() override;
 
  private:
   // Message handlers.
-  void OnChildSupportsTracing();
-  void OnEndTracingAck(const std::vector<std::string>& known_categories);
-  void OnWatchEventMatched();
-  void OnTraceLogStatusReply(const base::trace_event::TraceLogStatus& status);
-  void OnTraceDataCollected(const std::string& data);
   void OnTriggerBackgroundTrace(const std::string& histogram_name);
   void OnAbortBackgroundTrace();
 
-  // ChildTraceMessageFilter exists:
-  bool has_child_;
-
-  // Hash of id of the child process.
-  uint64_t tracing_process_id_;
-
-  // Awaiting ack for previously sent SendEndTracing
-  bool is_awaiting_end_ack_;
-  // Awaiting ack for previously sent SendGetTraceLogStatus
-  bool is_awaiting_buffer_percent_full_ack_;
-
   DISALLOW_COPY_AND_ASSIGN(TraceMessageFilter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_TRACING_TRACE_MESSAGE_FILTER_H_