Add 'sizes' step to mac_rel and linux_rel.
Add 'sizes' step to mac_rel and linux_rel.

I doubt it's terribly useful though, since the try servers build
without SVG but get baselines from the main waterfall which has
SVG enabled (if this is sufficient to even enable the comparisons
with a baseline).

Review URL: http://codereview.chromium.org/9190046

git-svn-id: 239fca9b83025a0b6f823aeeca02ba5be3d9fd76@117468 0039d316-1c4b-4281-b951-d872f2087c98

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