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// 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_PUBLIC_BROWSER_TRACE_SUBSCRIBER_H_
#define CONTENT_PUBLIC_BROWSER_TRACE_SUBSCRIBER_H_
#include <set>
#include "base/memory/ref_counted_memory.h"
namespace content {
// Objects interested in receiving trace data derive from TraceSubscriber. All
// callbacks occur on the UI thread.
// See also: trace_message_filter.h
// See also: child_trace_message_filter.h
class TraceSubscriber {
public:
// Called once after TraceController::EndTracingAsync.
virtual void OnEndTracingComplete() = 0;
// Called 0 or more times between TraceController::BeginTracing and
// OnEndTracingComplete. Use base::debug::TraceResultBuffer to convert one or
// more trace fragments to JSON.
virtual void OnTraceDataCollected(
const scoped_refptr<base::RefCountedString>& trace_fragment) = 0;
// Called once after TraceController::GetKnownCategoriesAsync.
virtual void OnKnownCategoriesCollected(
const std::set<std::string>& known_categories) {}
virtual void OnTraceBufferPercentFullReply(float percent_full) {}
virtual void OnEventWatchNotification() {}
protected:
virtual ~TraceSubscriber() {}
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_TRACE_SUBSCRIBER_H_
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