Bug 1112622 - Remove the special case to disable PGO with MSVC2010 from js/src/moz.build; r=glandium

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extra : rebase_source : a60da260641a1b7fdc9352e970b5acba83a94a98
Bug 1109895 - Send the correct -m flags to clang-cl when building libvpx; r=jrmuizel

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extra : rebase_source : 2806ced531eb39e33b30337f1112e4efb3e179db
Bug 1109311 - Fix the -Wundefined-bool-conversion warning in nsHtml5TreeBuilder.cpp resulting from checking the value of this; r=hsivonen

Clang gives the following warning for this code:

'this' pointer cannot be null in well-defined C++ code; pointer may be assumed to always convert to true

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extra : rebase_source : cd9bc242d22b0a5aa6767ce442368638d6186400