Pin keyboard works with virtual keyboard.
The pin keyboard now hides its input element and passes its data to the user pod password element.
BUG=
632383
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
Committed:
https://crrev.com/d1ed179e46f28f6681d91a12635419aa4a9feed3
Cr-Commit-Position: refs/heads/master@{#415155}