Bug 834059 - Send processses into the foreground when they first launch, so they don't get killed quite so quickly. r=cjones, a=blocking-tef

This patch also sends the preallocated process into the background immediately after it's launched.

--HG--
extra : transplant_source : %0A%0E%FDXzL3v%EAB%5B%F5%2Cw%81%AC%C5%B1%B0%05
Bug 833935 - Stop using one static var per compilation unit. r=jdm a=blocking-b2g