Get SCons building Windows again without having to Import()/re-Export():  use the $PLATFORM construction variable supplied in the construction environment instead of passing around our own PLATFORM variable in Python.
R=keunwoo,evanm

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@202 0039d316-1c4b-4281-b951-d872f2087c98
9 files changed