chromium/components/page_load_metrics/browser/observers/fenced_frames_page_load_metrics_observer.h

// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_PAGE_LOAD_METRICS_BROWSER_OBSERVERS_FENCED_FRAMES_PAGE_LOAD_METRICS_OBSERVER_H_
#define COMPONENTS_PAGE_LOAD_METRICS_BROWSER_OBSERVERS_FENCED_FRAMES_PAGE_LOAD_METRICS_OBSERVER_H_

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

namespace internal {

extern const char kHistogramFencedFramesNavigationToFirstPaint[];
extern const char kHistogramFencedFramesNavigationToFirstImagePaint[];
extern const char kHistogramFencedFramesNavigationToFirstContentfulPaint[];
extern const char kHistogramFencedFramesNavigationToLargestContentfulPaint2[];
extern const char kHistogramFencedFramesFirstInputDelay4[];
extern const char kHistogramFencedFramesCumulativeShiftScore[];
extern const char kHistogramFencedFramesCumulativeShiftScoreMainFrame[];

}  // namespace internal

// FencedFramesPageLoadMetricsObserver records UMA histograms prefixed by
// "PageLoad.Clients.FencedFrames" that contains information inside a
// FencedFrames. See https://github.com/shivanigithub/fenced-frame  to learn
// FencedFrames details.
class FencedFramesPageLoadMetricsObserver
    : public page_load_metrics::PageLoadMetricsObserver { … };

#endif  // COMPONENTS_PAGE_LOAD_METRICS_BROWSER_OBSERVERS_FENCED_FRAMES_PAGE_LOAD_METRICS_OBSERVER_H_