This fixes build errors like this: error: Could not read profile ../../chrome/build/pgo_profiles/chrome-linux-4951-1649181099-528ef6669805f2d3db6f3ad7429cfa57a6078271.profdata: unsupported instrumentation profile format version We already package the most recent stable LLVM version for Chromium but Google relies on unreleased (Git) versions (thanks...). This isn't ideal but I don't have the time to package yet another LLVM version so it'll have to cut it for now. See build/config/compiler/pgo/pgo.gni: - 0 : Means that PGO is turned off. - 1 : Used during the PGI (instrumentation) phase. - 2 : Used during the PGO (optimization) phase. With is_official_build the default is chrome_pgo_phase = 2.main
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