add SK_SUPPORT_LEGACY_PATHEFFECT_PTR flag for future skia CL
add SK_SUPPORT_LEGACY_PATHEFFECT_PTR flag for future skia CL

BUG=

Review URL: https://codereview.chromium.org/1810403002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#381999}

axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk,axinging/chromium-crosswalk