Fix click focusing on multi-process OS X (bug 908453, r=smaug).
Bug 907512: Update NSPR to NSPR_4_10_1_BETA2.
Backed out changesets aed22a2d8353 and c61fe8e1f887 (bug 908006) for OSX reftest failures.
Bug 784739 - Switch from NULL to nullptr in image/. r=ehsan
Bug 784739 - Switch from NULL to nullptr in hal/. r=ehsan
Bug 784739 - Switch from NULL to nullptr in intl/. r=ehsan
Bug 784739 - Switch from NULL to nullptr in ipc/. r=ehsan
Bug 784739 - Switch from NULL to nullptr in ipc/glue/. r=ehsan
Bug 908180 - Don't #include nsGUIEvent.h in nsIPresShell.h. r=mounir