Check in the original bloat.py script to generate image treemap json.
Check in the original bloat.py script to generate image treemap json.

This is the original Python utility from https://github.com/martine/bloat.  I'll
upload a patched version for review in a subsequent CL. Longer term we should
probably create an ebuild and pull the tool from a mirrored upstream.

BUG=chromium-os:11432
TEST=none

Change-Id: If4a40b43d63f533642fe08061a378eb7988e823c

Review URL: http://codereview.chromium.org/6358014

zhang0137/chromite,zhang0137/chromite,chadversary/chromiumos.chromite,chadversary/chromiumos.chromite,coreos/chromite,bpsinc-native/src_third_party_chromite,zhang0137/chromite,coreos/chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,coreos/chromite