Move test-only stuff from cc/debug/ to cc/test

This moves the test/fake context implementations from cc/debug/ to cc/test
and stops linking them into production targets. Test targets elsewhere in
the tree can link against cc_test_support to use these.

R=danakj,piman

Review URL: https://codereview.chromium.org/50303007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232025 0039d316-1c4b-4281-b951-d872f2087c98
39 files changed