Screen Orientation: use OrientationLockType enum for lockOrientation().

BUG=162827

Review URL: https://codereview.chromium.org/204653002

git-svn-id: svn://svn.chromium.org/blink/trunk@169972 bbb929c8-8fbe-4397-9dbb-9b2b20218538
void ScreenOrientation::orientationLockTimerFired(Timer<ScreenOrientation>*)
{
    if (m_lockedOrientations == WebScreenOrientationDefault)
        blink::Platform::current()->unlockOrientation();
    else
        blink::Platform::current()->lockOrientation(m_lockedOrientations);
}

void ScreenOrientation::orientationLockTimerFired(Timer<ScreenOrientation>*)
{
    if (m_lockedOrientations == WebScreenOrientationDefault)
        blink::Platform::current()->unlockOrientation();
    else
        blink::Platform::current()->lockOrientation(m_lockedOrientations);
}
