Revert of First pass BackgroundTracingManager.

content/public/browser/background_tracing_manager.h

-// Copyright 2015 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_PUBLIC_BROWSER_BACKGROUND_TRACING_MANAGER_H_
-#define CONTENT_PUBLIC_BROWSER_BACKGROUND_TRACING_MANAGER_H_
-
-#include "base/trace_event/trace_event_impl.h"
-#include "base/values.h"
-#include "content/common/content_export.h"
-
-namespace content {
-struct BackgroundTracingConfig;
-struct BackgroundTracingUploadConfig;
-
-// BackgroundTracingManager is used on the browser process to trigger the
-// collection of trace data and upload the results. Only the browser UI thread
-// is allowed to interact with the BackgroundTracingManager. All callbacks are
-// called on the UI thread.
-class BackgroundTracingManager {
- public:
-  CONTENT_EXPORT static BackgroundTracingManager* GetInstance();
-
-  // ReceiveCallback will will be called on the UI thread every time the
-  // BackgroundTracingManager finalizes a trace. The first parameter of
-  // this callback is the trace data. The second is a callback to
-  // notify the BackgroundTracingManager that you've finished processing
-  // the trace data.
-  //
-  // Example:
-  //
-  // void Upload(const base::RefCountedString* data,
-  //             base::Closure done_callback) {
-  //   BrowserThread::PostTaskAndReply(
-  //       BrowserThread::FILE,
-  //       FROM_HERE,
-  //       base::Bind(&DoUploadOnFileThread, data),
-  //       done_callback
-  //     );
-  // }
-  //
-  typedef base::Callback<void(const base::RefCountedString*, base::Closure)>
-      ReceiveCallback;
-
-  // Set the triggering rules for when to start recording.
-  //
-  // In preemptive mode, recording begins immediately and any calls to
-  // TriggerNamedEvent() will potentially trigger the trace to finalize and get
-  // uploaded to the specified upload_sink. Once the trace has been uploaded,
-  // tracing will be enabled again.
-  //
-  // In reactive mode, recording begins when TriggerNamedEvent() is called, and
-  // continues until either the next call to TriggerNamedEvent, or a timeout
-  // occurs. Tracing will not be re-enabled after the trace is finalized and
-  // uploaded to the upload_sink.
-  //
-  // Calls to SetActiveScenario() with a config will fail if tracing is
-  // currently on. Use WhenIdle to register a callback to get notified when
-  // the manager is idle and a config can be set again.
-  virtual bool SetActiveScenario(scoped_ptr<BackgroundTracingConfig> config,
-                                 const ReceiveCallback& receive_callback,
-                                 bool requires_anonymized_data) = 0;
-
-  // Notifies the caller when the manager is idle (not recording or uploading),
-  // so that a call to SetActiveScenario() is likely to succeed.
-  typedef base::Callback<void()> IdleCallback;
-  virtual void WhenIdle(IdleCallback idle_callback) = 0;
-
-  typedef base::Callback<void(bool)> StartedFinalizingCallback;
-  typedef int TriggerHandle;
-
-  // Notifies that a manual trigger event has occurred, and we may need to
-  // either begin recording or finalize the trace, depending on the config.
-  // If the trigger specified isn't active in the config, this will do nothing.
-  virtual void TriggerNamedEvent(
-      TriggerHandle trigger_handle,
-      StartedFinalizingCallback started_callback) = 0;
-
-  // Registers a manual trigger handle, and returns a TriggerHandle which can
-  // be passed to DidTriggerHappen().
-  virtual TriggerHandle RegisterTriggerType(const char* trigger_name) = 0;
-
-  // Returns a list of all registered triggers.
-  virtual void GetTriggerNameList(std::vector<std::string>* trigger_names) = 0;
-
-  virtual void InvalidateTriggerHandlesForTesting() = 0;
-
- protected:
-  virtual ~BackgroundTracingManager() {}
-};
-
-}  // namespace content
-
-#endif  // CONTENT_PUBLIC_BROWSER_BACKGROUND_TRACING_MANAGER_H_