add SK_SUPPORT_LEGACY_NEW_SURFACE_API flag for future skia CL
add SK_SUPPORT_LEGACY_NEW_SURFACE_API flag for future skia CL

BUG=

TBR=fmalita

Review URL: https://codereview.chromium.org/1823003002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#382503}

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