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This function allows us to compare a module in memory with 
its original on disk, and identify any differences (after 
accounting for relocations).  The state of the module 
(MODULE_UNKNOWN, MODULE_UNMODIFIED or MODULE_MODIFIED) is 
returned along with a list of the possibly modified exported 
functions of the module.


BUG=401854

Review URL: https://codereview.chromium.org/406043003

Cr-Commit-Position: refs/heads/master@{#288319}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288319 0039d316-1c4b-4281-b951-d872f2087c98