Backed out 7 changesets (bug 832920, bug 776536, bug 843261) for mochitest-a11y assertions on a CLOSED TREE.

--HG--
rename : content/base/src/NodeIterator.cpp => content/base/src/nsNodeIterator.cpp
rename : content/base/src/NodeIterator.h => content/base/src/nsNodeIterator.h
rename : content/base/src/TreeWalker.cpp => content/base/src/nsTreeWalker.cpp
rename : content/base/src/TreeWalker.h => content/base/src/nsTreeWalker.h
Bug 846368 - Add number of bytes requested to OOM last-gasp r=bsmedberg