weblayer/browser/ukm_page_load_metrics_observer.h

// Copyright 2020 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 WEBLAYER_BROWSER_UKM_PAGE_LOAD_METRICS_OBSERVER_H_
#define WEBLAYER_BROWSER_UKM_PAGE_LOAD_METRICS_OBSERVER_H_

#include "components/page_load_metrics/browser/page_load_metrics_observer.h"

namespace content {
class NavigationHandle;
}

namespace weblayer {

// If URL-Keyed-Metrics (UKM) is enabled in the system, this is used to
// populate it with top-level page-load metrics.
class UkmPageLoadMetricsObserver
    : public page_load_metrics::PageLoadMetricsObserver {
 public:
  // Returns a UkmPageLoadMetricsObserver, or nullptr if it is not needed.
  static std::unique_ptr<page_load_metrics::PageLoadMetricsObserver>
  CreateIfNeeded();

  UkmPageLoadMetricsObserver() = default;
  ~UkmPageLoadMetricsObserver() override = default;

  // page_load_metrics::PageLoadMetricsObserver implementation:
  ObservePolicy OnCommit(content::NavigationHandle* navigation_handle,
                         ukm::SourceId source_id) override;
};

}  // namespace weblayer

#endif  // WEBLAYER_BROWSER_UKM_PAGE_LOAD_METRICS_OBSERVER_H_