Bug 872823 - implement oomAfterAllocations testing function

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extra : rebase_source : 9baca68d56f8b15e691f2154bd8aa6b6cea45845
Bug 874103 - Rename StringWrapper to avoid aliasing another struct for the static rooting analysis

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extra : rebase_source : 80893381c4d6c7aa32640bd7cf1199cf96524c5b