First shot at implementing the ping back for improved binary download protection in Chrome.

Integration with the download manager will be done in a later CL
(should be fairly staightforward). Most of the hooks are there
already except for the UI to treat a malicious response.

Original patch by noelutz in issue 8083017.

BUG=
TEST=DownloadProtectionServiceTest


Review URL: http://codereview.chromium.org/8200014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@105230 0039d316-1c4b-4281-b951-d872f2087c98
8 files changed