tree 2863432a8e8d72a576bcf6eb82a459680c27c177
parent cacf90cc483c4437657d6eae72a6847cdb1d56a6
author Vadim Tryshev <vadimt@google.com> 1525292056 -0700
committer Vadim Tryshev <vadimt@google.com> 1525292056 -0700

New calculation for clear-all alpha.

Per UX feedback, alpha changes from the central position of the last
task and its overscrolled position. Button location is not used.

Bug: 72222505
Test: Manual
Change-Id: Ifc22c935940eaeb1b1ec6e4a5f2709ac7ae8253b