GitLab

ImeController::CanCycleIme() and ImeController::CanSwitchIme() should first
check if IME state is NULL and if it is, ignore the cycle / switch action
because it does not make sense before IME initialization.

BUG=703510

Review-Url: https://codereview.chromium.org/2806613002
Cr-Commit-Position: refs/heads/master@{#467804}