Our B777 Non-Normal Checklist says:
If forward window arcing, shattered, or cracked:
FORWARD WINDOW HEAT
SWITCH (Affected window) . . . . . . . . . . . . . . . . . . . . . .OFF
[Removes electrical power to prevent arcing.]
Do not accomplish the following checklist:
WINDOW HEAT FWD
If damaged window deforms, or air leak is observed:
Plan to land at the nearest suitable airport.
If airplane altitude above 10,000 feet:
Descend to lowest safe altitude or 10,000 feet,
whichever is higher.
[Minimizes forces on the window. Outward cabin pressure
differential counters inward dynamic air load on the window.]
Sustained flight below 10,000 feet is not recommended
due to greater risk of bird strike.