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The Skia's hello world example looks nicer, so use it to replace
the current Draw function.

Bug: None
Change-Id: I61fad12dae5a57bca0b37b6e9db3eb908f7e45b1
Reviewed-on: https://chromium-review.googlesource.com/935159Reviewed-by: Robert Kroeger <rjkroege@chromium.org>
Commit-Queue: Peng Huang <penghuang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#539148}