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This is being done with the intention to port this tool to other
platforms. The first step is to move the existing code to a common
location.

Review URL: https://codereview.chromium.org/402803005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284207 0039d316-1c4b-4281-b951-d872f2087c98