Add a simple tool which enables automated bisecting of codebase with manual test

Creates a tool which enables bisection the codebase, with the user prompted to
manually test a given revision and enter whether it is good or bad. Useful in
tracking down the CL which caused a bug which can be triggered manually.

BUG=

Review URL: https://chromiumcodereview.appspot.com/18316008

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@210824 0039d316-1c4b-4281-b951-d872f2087c98
3 files changed