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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_PUBLIC_BROWSER_TRACING_DELEGATE_H_
#define CONTENT_PUBLIC_BROWSER_TRACING_DELEGATE_H_
#include "base/functional/callback.h"
#include "base/values.h"
#include "content/common/content_export.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
namespace content {
// This can be implemented by the embedder to provide functionality for the
// about://tracing WebUI.
class CONTENT_EXPORT TracingDelegate {
public:
virtual ~TracingDelegate() = default;
// This can be used to veto a particular background tracing scenario.
virtual bool IsAllowedToBeginBackgroundScenario(
const std::string& scenario_name,
bool requires_anonymized_data,
bool is_crash_scenario);
virtual bool IsAllowedToEndBackgroundScenario(
const std::string& scenario_name,
bool requires_anonymized_data,
bool is_crash_scenario);
// Whether system-wide performance trace collection using the external system
// tracing service is enabled.
virtual bool IsSystemWideTracingEnabled();
// Used to add any additional metadata to traces.
virtual absl::optional<base::Value::Dict> GenerateMetadataDict();
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_TRACING_DELEGATE_H_
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