Fixes a crash which occurred on firefox-linux when resizing (and was
causing blanks during resize in other browsers)
The issue was due to attempting to resize the drawing buffer while it
was being rendered to, which causes a browser crash since firefox
destroys that buffer while it is still being accessed. This essentially
defers the resize to just before drawing, so that it won't be resized
*while* being drawn to.
Release Notes:
- N/A
Owen Law
e5d90989e3