Move tracing code in content\browser to content\browser\tracing now that there's a separate directo…

content/browser/trace_controller_impl.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_TRACE_CONTROLLER_IMPL_H_
-#define CONTENT_BROWSER_TRACE_CONTROLLER_IMPL_H_
-
-#include <set>
-#include <string>
-#include <vector>
-
-#include "base/debug/trace_event.h"
-#include "base/lazy_instance.h"
-#include "content/public/browser/trace_controller.h"
-
-class CommandLine;
-
-namespace content {
-class TraceMessageFilter;
-
-class TraceControllerImpl : public TraceController {
- public:
-  static TraceControllerImpl* GetInstance();
-
-  // Called on the main thread of the browser process to initialize
-  // startup tracing.
-  void InitStartupTracing(const CommandLine& command_line);
-
-  // Get set of known categories. This can change as new code paths are reached.
-  // If true is returned, subscriber->OnKnownCategoriesCollected will be called
-  // once the categories are retrieved from child processes.
-  bool GetKnownCategoriesAsync(TraceSubscriber* subscriber);
-
-  // Same as above, but specifies which categories to trace.
-  // If both included_categories and excluded_categories are empty,
-  //   all categories are traced.
-  // Else if included_categories is non-empty, only those are traced.
-  // Else if excluded_categories is non-empty, everything but those are traced.
-  bool BeginTracing(TraceSubscriber* subscriber,
-                    const std::vector<std::string>& included_categories,
-                    const std::vector<std::string>& excluded_categories);
-
-  // TraceController implementation:
-  virtual bool BeginTracing(TraceSubscriber* subscriber,
-                            const std::string& categories) OVERRIDE;
-  virtual  bool EndTracingAsync(TraceSubscriber* subscriber) OVERRIDE;
-  virtual bool GetTraceBufferPercentFullAsync(
-      TraceSubscriber* subscriber) OVERRIDE;
-  virtual bool SetWatchEvent(TraceSubscriber* subscriber,
-                             const std::string& category_name,
-                             const std::string& event_name) OVERRIDE;
-  virtual bool CancelWatchEvent(TraceSubscriber* subscriber) OVERRIDE;
-  virtual void CancelSubscriber(TraceSubscriber* subscriber) OVERRIDE;
-
- private:
-  typedef std::set<scoped_refptr<TraceMessageFilter> > FilterMap;
-
-  friend struct base::DefaultLazyInstanceTraits<TraceControllerImpl>;
-  friend class TraceMessageFilter;
-
-  TraceControllerImpl();
-  virtual ~TraceControllerImpl();
-
-  bool is_tracing_enabled() const {
-    return can_end_tracing();
-  }
-
-  bool can_end_tracing() const {
-    return is_tracing_ && pending_end_ack_count_ == 0;
-  }
-
-  // Can get Buffer Percent Full
-  bool can_get_buffer_percent_full() const {
-    return is_tracing_ &&
-        pending_end_ack_count_ == 0 &&
-        pending_bpf_ack_count_ == 0;
-  }
-
-  bool can_begin_tracing(TraceSubscriber* subscriber) const {
-    return !is_tracing_ &&
-        (subscriber_ == NULL || subscriber == subscriber_);
-  }
-
-  // Methods for use by TraceMessageFilter.
-
-  void AddFilter(TraceMessageFilter* filter);
-  void RemoveFilter(TraceMessageFilter* filter);
-  void OnTracingBegan(TraceSubscriber* subscriber);
-  void OnEndTracingAck(const std::vector<std::string>& known_categories);
-  void OnTraceDataCollected(
-      const scoped_refptr<base::RefCountedString>& events_str_ptr);
-  void OnTraceNotification(int notification);
-  void OnTraceBufferPercentFullReply(float percent_full);
-
-  FilterMap filters_;
-  TraceSubscriber* subscriber_;
-  // Pending acks for EndTracingAsync:
-  int pending_end_ack_count_;
-  // Pending acks for GetTraceBufferPercentFullAsync:
-  int pending_bpf_ack_count_;
-  float maximum_bpf_;
-  bool is_tracing_;
-  bool is_get_categories_;
-  std::set<std::string> known_categories_;
-  std::vector<std::string> included_categories_;
-  std::vector<std::string> excluded_categories_;
-  std::string watch_category_;
-  std::string watch_name_;
-
-  DISALLOW_COPY_AND_ASSIGN(TraceControllerImpl);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_TRACE_CONTROLLER_IMPL_H_
-