Source/WebCore/page/RemoteFrameLayoutInfo.h

/*
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#pragma once

#include <WebCore/LayoutRect.h>

namespace WebCore {

// Collection of layout info regarding a (potentially remote) frame.
// This is synchronized from LocalFrame in one process to RemoteFrames
// in other processes using FrameTreeSyncData. Currently, it is used by
// Intersection Observer to compute the intersection rectangle from any processes.
struct RemoteFrameLayoutInfo {
    // Rectangle of the visible portion of the frame in its parent frame,
    // in the coordinate space of the document of the parent frame.
    std::optional<LayoutRect> visibleRectInParent;

    // RenderStyle::usedZoom of the owner renderer of the frame.
    float usedZoom;
};

};