tree 4844daa3ac80ca736400cc014b16c7cf3f944523
parent 160222a4390d7738b541ed3f5c116d22c1fda04b
author Udam Saini <udam@google.com> 1459273758 -0700
committer Udam Saini <udam@google.com> 1459274101 -0700

Calling setIsDrawerPresent(false) twice causes a crash.

We should only call setDrawerLockMode(...) if mDrawerLayout isn't
null.

bug:26288300
Change-Id: I8a1b77e03414360f9cd7e3fa6e6c98ef0e139ebf