Add use of the Psyco JIT compiler to GYP on Windows.  On my z600 with 12 GB of RAM, this shortens the time taken for a warm run of build/chromium_gyp from approximately 90 seconds down to approximately 70 seconds.  On the other hand, it increases maximum memory usage for the GYP process from ~132 MB to ~158 MB on the same test system.

At the moment it is unknown whether using Psyco on Mac and Linux would pay off; follow-up changes may address this if it is.

BUG=none
TEST=things build correctly

Review URL: http://codereview.chromium.org/6778017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@79871 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed