Annotate mapped memory regions for LeakSanitizer.
Add in-code annotations for LeakSanitizer to treat any memory allocated through
the VirtualMemory class as a source of live pointers. This change eliminates
false positive leak reports when running Chromium under LSan.
BUG=chromium:328552
R=mstarzinger@chromium.org
LOG=Y
Review URL: https://codereview.chromium.org/
137313002
Patch from Sergey Matveev <earthdok@chromium.org>.
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18589
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00