Rename EtwSystemEventConsumerWin to EtwTracingAgent

content/browser/tracing/etw_system_event_consumer_win.h

-// Copyright 2014 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_ETW_SYSTEM_EVENT_CONSUMER_WIN_H_
-#define CONTENT_BROWSER_TRACING_ETW_SYSTEM_EVENT_CONSUMER_WIN_H_
-
-#include <memory>
-
-#include "base/bind.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted_memory.h"
-#include "base/threading/thread.h"
-#include "base/trace_event/tracing_agent.h"
-#include "base/values.h"
-#include "base/win/event_trace_consumer.h"
-#include "base/win/event_trace_controller.h"
-
-namespace base {
-template <typename Type>
-struct DefaultSingletonTraits;
-}
-
-namespace content {
-
-class EtwSystemEventConsumer
-    : public base::win::EtwTraceConsumerBase<EtwSystemEventConsumer>,
-      public base::trace_event::TracingAgent {
- public:
-  // 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;
-  void StopAgentTracing(const StopAgentTracingCallback& callback) override;
-
-  // Retrieve the ETW consumer instance.
-  static EtwSystemEventConsumer* GetInstance();
-
- private:
-  // This allows constructor and destructor to be private and usable only
-  // by the Singleton class.
-  friend struct base::DefaultSingletonTraits<EtwSystemEventConsumer>;
-
-  // Constructor.
-  EtwSystemEventConsumer();
-  ~EtwSystemEventConsumer() override;
-
-  void AddSyncEventToBuffer();
-  void AppendEventToBuffer(EVENT_TRACE* event);
-
-  // Static override of EtwTraceConsumerBase::ProcessEvent.
-  // @param event the raw ETW event to process.
-  friend class base::win::EtwTraceConsumerBase<EtwSystemEventConsumer>;
-  static void ProcessEvent(EVENT_TRACE* event);
-
-  // Request the ETW trace controller to activate the kernel tracing.
-  // returns true on success, false if the kernel tracing isn't activated.
-  bool StartKernelSessionTracing();
-
-  // Request the ETW trace controller to deactivate the kernel tracing.
-  // @param callback the callback to call with the consumed events.
-  // @returns true on success, false if an error occurred.
-  bool StopKernelSessionTracing();
-
-  void OnStopSystemTracingDone(
-    const StopAgentTracingCallback& callback,
-    const scoped_refptr<base::RefCountedString>& result);
-
-  void TraceAndConsumeOnThread();
-  void FlushOnThread(const StopAgentTracingCallback& callback);
-
-  std::unique_ptr<base::ListValue> events_;
-  base::Thread thread_;
-  TRACEHANDLE session_handle_;
-  base::win::EtwTraceProperties properties_;
-
-  DISALLOW_COPY_AND_ASSIGN(EtwSystemEventConsumer);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_TRACING_ETW_SYSTEM_EVENT_CONSUMER_WIN_H_