8155224: Bring back version control history to g1Policy.hpp and g1DefaultPolicy.*

[Erik Helin]

Hi all,

this a rather strange patch :)

When I made the commit for JDK-8154753 "Turn G1Policy into an
interface" [0], I used `hg mv --after` to record that the file
g1DefaultPolicy.cpp originated from g1Policy.cpp (and for .hpp files as
well). However, this did not seem to preserve the history, since `hg log
--follow g1DefaultPolicy.cpp` does not show the changes that were made
to g1Policy.cpp.

To fix this, I updated my the hotspot repository to the parent of
ce2108 and re-created the change. However, this time I used `hg mv` and
`hg cp` when moving the files (thanks Mikael for the tip). I then merge
the new head with the tip of jdk9/hs/hotspot (a benign merge since the
content of the files are identical). Now, the history is "back" (it was
never lost, it just wasn't possible to conveniently  view it with `hg
log --follow`).

So, please re-review this identical change for JDK-8154753. webrev can't
tell that I used different hg commands, so the webrev will look
identical.

Bug:
https://bugs.openjdk.java.net/browse/JDK-8155224

Webrev:
http://cr.openjdk.java.net/~ehelin/8155224/webrev.00/

Thanks,
Erik

0: http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/ce2108f27dcb