tree bb26e46a79f9945276ebc6c9eebbd3dd0e3397fc
parent 5f80e8cb7cfb83a69d478861f01ea8e965fcd448
author robertphillips <robertphillips@google.com> 1460989205 -0700
committer Commit bot <commit-bot@chromium.org> 1460989205 -0700

Split AlphaThresholdEffect out into its own file

Mainly mechanical although I did:
   convert Create method to sk_sp Make version
   rm extra '\t's and '\n's in emitCode

TBR=reed@google.com
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1893193002

Review URL: https://codereview.chromium.org/1893193002