Revert 213299 "Add the tracing manager"

trunk/src/chrome/browser/feedback/tracing_manager.h

Index: trunk/src/chrome/browser/feedback/tracing_manager.h
===================================================================
--- trunk/src/chrome/browser/feedback/tracing_manager.h	(revision 213306)
+++ trunk/src/chrome/browser/feedback/tracing_manager.h	(working copy)
@@ -1,80 +0,0 @@
-// Copyright 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 CHROME_BROWSER_FEEDBACK_TRACING_MANAGER_H_
-#define CHROME_BROWSER_FEEDBACK_TRACING_MANAGER_H_
-
-#include <map>
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/callback.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/weak_ptr.h"
-#include "content/public/browser/trace_subscriber.h"
-
-// Callback used for getting the output of a trace.
-typedef base::Callback<void(scoped_refptr<base::RefCountedString> trace_data)>
-    TraceDataCallback;
-
-// This class is used to manage performance meterics that can be attached to
-// feedback reports.  This class is a Singleton that is owned by the preference
-// system.  It should only be created when it is enabled, and should only be
-// accessed elsewhere via Get().
-//
-// When a performance trace is desired, TracingManager::Get()->RequestTrace()
-// should be invoked.  The TracingManager will then start preparing a zipped
-// version of the performance data.  That data can then be requested via
-// GetTraceData().  When the data is no longer needed, it should be discarded
-// via DiscardTraceData().
-class TracingManager : public content::TraceSubscriber {
- public:
-  virtual ~TracingManager();
-
-  // Create a TracingManager.  Can only be called when none exists.
-  static scoped_ptr<TracingManager> Create();
-
-  // Get the current TracingManager.  Returns NULL if one doesn't exist.
-  static TracingManager* Get();
-
-  // Request a trace ending at the current time.  If a trace is already being
-  // collected, the id for that trace is returned.
-  int RequestTrace();
-
-  // Get the trace data for |id|.  On success, true is returned, and the data is
-  // returned via |callback|.  Returns false on failure.
-  bool GetTraceData(int id, const TraceDataCallback& callback);
-
-  // Discard the data for trace |id|.
-  void DiscardTraceData(int id);
-
- private:
-  void StartTracing();
-
-  // content::TraceSubscriber overrides
-  virtual void OnEndTracingComplete() OVERRIDE;
-  virtual void OnTraceDataCollected(
-      const scoped_refptr<base::RefCountedString>& trace_fragment) OVERRIDE;
-
-  TracingManager();
-
-  // Data being collected from the current trace.
-  std::string data_;
-
-  // ID of the trace that is being collected.
-  int current_trace_id_;
-
-  // Mapping of trace ID to trace data.
-  std::map<int, scoped_refptr<base::RefCountedString> > trace_data_;
-
-  // Callback for the current trace request.
-  TraceDataCallback trace_callback_;
-
-  base::WeakPtrFactory<TracingManager> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(TracingManager);
-};
-
-#endif  // CHROME_BROWSER_FEEDBACK_TRACING_MANAGER_H_
-