7c850745d3670113307ef8dc69657534abadb50d

This avoids them getting wiped during sync for every build, which saves build time on Windows. I also removed no longer present google-visualization-python dir. BUG=none TEST=none git-svn-id: http://webrtc.googlecode.com/svn/trunk@3488 4adac7df-926f-26a2-2b94-8c16560cd09d
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