Test gyp on both win32 and win64, as there's actually been a regression of the unit tests due to the lack on win64.
Test gyp on both win32 and win64, as there's actually been a regression
of the unit tests due to the lack on win64.

BUG=None
TEST=None

Review URL: http://codereview.chromium.org/6516015

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@74831 0039d316-1c4b-4281-b951-d872f2087c98

eunchong/build,eunchong/build,eunchong/build,eunchong/build