If good..bad range is all before or after the recent build cutoff, use the appropriate server.
If good..bad range is all before or after the recent build cutoff, use the appropriate server.

If good..bad straddles the recent build cutoff, test out the oldest recent build. If that build is good, bisect only recent builds from build.chromium.org. If that build is bad, bisect only old builds.

BUG=89974
TEST=(1) run bisect-builds.py with defaults; (2) accept default good/bad args; when chrome starts, close it and specify good; verify that further downloads come from build.chromium.org domain. Repeat (1) and (2); specify bad; verify that further downloads come from commondatastorage.googleapis.com.

Review URL: http://codereview.chromium.org/7468020

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@93432 0039d316-1c4b-4281-b951-d872f2087c98

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