
Make sure we don't reload a <video> element when navigating back to an uncached page.

EVENT(loadstart)
EVENT(canplaythrough)
EXPECTED (loadCount == '0') OK
*** Page going into cache
*** Changing playbackRate just before going into cache, to schedule a ratechange event.
*** Changing volume just before going into cache, to schedule a volumechange event.
*** Page returned from cache
EXPECTED (loadCount == '1') OK
EXPECTED (videoComputedStyle.width == '320px') OK
EXPECTED (videoComputedStyle.height == '240px') OK
*** ratechange event fired. This should happen AFTER returning from cache.
*** volumechange event fired. This should happen AFTER returning from cache.