[Webkit-unassigned] [Bug 175393] New: [Repaint from Layout Removal] Move layer repaint rects into a map

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=175393

            Bug ID: 175393
           Summary: [Repaint from Layout Removal] Move layer repaint rects
                    into a map
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: hyatt at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Move layer repaint rects into a map. Since many layers aren't self-painting, they're wasting space holding those rects. In addition, once we start caching rects for RenderLayerModelObjects that don't have layers (i.e., everyone using a LayoutRepainter right now), then we'll want to have a common structure.

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