When the change for JDK-8154753 was done, the correct mercurial commands were not used, so the history to g1Policy.cpp and g1Policy.hpp was "lost" (it is of course still present in the mercurial repository but not easliy viewed with hg log).

Fix this by redoing the change for JDK-8154753 with the correct mercurial commands and create a merge. This will make the history "re-appear".