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Slice up the tiled image just like CursorLoaderX11 does and pass it on
to CursorFactory as a vector, hotspot, and frame delay.

Also add stub implementation for BitmapCursorFactoryOzone that just
creates a static cursor with the initial frame.

R=sky
BUG=343245
TEST=viewed css "wait" cursor on cros link_freon

Review URL: https://codereview.chromium.org/543823002

Cr-Commit-Position: refs/heads/master@{#293980}