Rebase GM on win7 after res cache change.

TBR=

Review URL: https://codereview.chromium.org/733133003
Allow GPU resources to not be counted against the cache budget.

BUG=skia:2889

Review URL: https://codereview.chromium.org/721353002
Remove bug_chomper

It has been moved into buildbot repo.

BUG=skia:

Review URL: https://codereview.chromium.org/731123003