tree bd2885d5234932bca8abe85db54f4bb5d44cb3ff
parent 66a576b79c6cf629c439f02a37b824a1ec35ec19
author Tao Bao <tbao@google.com> 1540317242 -0700
committer Tao Bao <tbao@google.com> 1540317414 -0700

ui: Add constness to Draw- functions.

These functions take the given GRSurface instances as inputs, which
shouldn't be altered.

Test: mmma -j bootable/recovery
Test: Run recovery_unit_test.
Test: `Run graphics test` on marlin.
Change-Id: I51bf408e85faae2b497d4f148ab1dec22dd16c93