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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_BROWSER_HISTOGRAM_SUBSCRIBER_H_
#define CONTENT_BROWSER_HISTOGRAM_SUBSCRIBER_H_
#include <string>
#include <vector>
namespace content {
// Objects interested in receiving histograms derive from HistogramSubscriber.
class HistogramSubscriber {
public:
virtual ~HistogramSubscriber() {}
// Send number of pending processes to subscriber. |end| is set to true if it
// is the last time. This is called on the UI thread.
virtual void OnPendingProcesses(int sequence_number,
int pending_processes,
bool end) = 0;
// Send |histogram| back to subscriber.
// This is called on the UI thread.
virtual void OnHistogramDataCollected(
int sequence_number,
const std::vector<std::string>& pickled_histograms) = 0;
};
} // namespace content
#endif // CONTENT_BROWSER_HISTOGRAM_SUBSCRIBER_H_
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