Tonight I wrote a Python script called chrome-bisect.py that performs
a binary search on the Mac continuous build archive. It takes a
starting known-good and bad revision and then downloads, unzips, and
opens the archived builds for you. You can then test the running build
and report back to chrome-bisect if the build is good or bad. The
binary search will then continue until it finds the version in which
the regression was introduced.

You can download it here: 
http://www.bluestatic.org/git/?p=Toolchain.git;a=blob_plain;f=chrome-bisect.py;hb=HEAD

The script will not work on Windows (it should work on Linux, for the
most part) because it uses `unzip` and `open` commands via os.system
(). Patches are welcome to make it more cross-platform. You can clone
the git repository it lives in here: http://www.bluestatic.org/git/Toolchain.git

- Robert Sesek

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