Use WebKit::LayerHostingContextID instead of uint32_t for videoLayerID. <rdar://problem/61806253>
Created attachment 402692 [details] Patch v1
Comment on attachment 402692 [details] Patch v1 Marking cq+ since this is a WebKit2-only change and won't affect mac-debug-wk1 tests.
Committed r263490: <https://trac.webkit.org/changeset/263490> All reviewed patches have been landed. Closing bug and clearing flags on attachment 402692 [details].