No bug - Add paragraph about the size of reftests.
Bug 993747 - nsAppRunner.cpp should use NS_FREE_PERMANENT_DATA rather than making up its own variant of the same concept.  r=karlt
Bug 991928 - Make warning about wrapping XUL boxes chrome-only.  r=bzbarsky
Bug 992324 patch 1 - Add a pref to disable interruptible reflow.  r=bzbarsky
Bug 992324 patch 2 - Disable interruptible reflow in reftest harness.  r=bzbarsky

Without this patch, mInterruptsEnabled is frequently (although not
always) initialized to true in nsPresContext::ReflowStarted while
running reftests; with the patch it is always initialized to false.