Skia analytic coverage depends on framebuffer dimensions as well as raster origin. Replay existing retained subtree pictures into the live viewport at settlement, while preserving overscan images for navigation. Keep settlement pending until the viewport pass and report the presentation path accurately. No additional viewport cache is allocated.
Preserve exact held/released assertions and cover odd/even/fractional pans at DPR 1, 1.25, 1.5 and 2. Verify native picture and backing identity reuse; update one pixel in the existing baseline only after proving equality with direct rendering.
Validation: full check, 735 scoped unit tests, and 58 targeted browser tests pass. The targeted set still excludes the previously classified paint-field-width baseline. An additional tiled large-blur test fails identically on parent d16400b3e, with byte-identical actual PNGs. Broader release acceptance remains separate.
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