Revert of First pass BackgroundTracingManager.

content/public/browser/background_tracing_preemptive_config.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_PREEMPTIVE_CONFIG_H_
-#define CONTENT_PUBLIC_BROWSER_BACKGROUND_TRACING_PREEMPTIVE_CONFIG_H_
-
-#include "content/public/browser/background_tracing_config.h"
-
-namespace content {
-
-// BackgroundTracingPreemptiveConfig holds trigger rules for use during
-// preemptive tracing. Tracing will be enabled immediately, and whenever
-// a trigger occurs, the trace will be finalized.
-struct CONTENT_EXPORT BackgroundTracingPreemptiveConfig
-    : public BackgroundTracingConfig {
- public:
-  BackgroundTracingPreemptiveConfig();
-  ~BackgroundTracingPreemptiveConfig() override;
-
-  enum RuleType {
-    MONITOR_AND_DUMP_WHEN_TRIGGER_NAMED,
-    MONITOR_AND_DUMP_WHEN_SPECIFIC_HISTOGRAM_AND_VALUE,
-    MONITOR_AND_DUMP_WHEN_BROWSER_STARTUP_COMPLETE,
-  };
-  struct HistogramTriggerInfo {
-    std::string histogram_name_to_trigger_on;
-    int histogram_bin_to_trigger_on;
-  };
-  struct NamedTriggerInfo {
-    std::string trigger_name;
-  };
-  struct MonitoringRule {
-    RuleType type;
-    HistogramTriggerInfo histogram_trigger_info;
-    NamedTriggerInfo named_trigger_info;
-  };
-
-  std::vector<MonitoringRule> configs;
-  CategoryPreset category_preset;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_PUBLIC_BROWSER_BACKGROUND_TRACING_PREEMPTIVE_CONFIG_H_