Add range check to allow for NULL to be counted as data or not by DHCP server.
Add range check to allow for NULL to be counted as data or not by DHCP server.

BUG=106851
TEST=On Windows, fire up Chrome and navigate to a couple of web pages, with proxy settings set to auto-detect.


Review URL: http://codereview.chromium.org/8892004

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@114019 0039d316-1c4b-4281-b951-d872f2087c98

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