Fix shift-selection.

The shift-selection code was failing to correctly anchor the selection
prior to shifting focus.  This meant that the first shift-navigation
event (i.e. starting from non-selection mode) would not select the right
set of stuff.

BUG=26459949

Change-Id: I62ed959fb549198c503cfd2131d2499f9a61f7e5
2 files changed