Disable the take-over of XP-era registration on Windows 8.
Disable the take-over of XP-era registration on Windows 8.

Eventually, we need to detect whether or not Chrome was made the default handler and take the XP-era registration if so.  That requires some code motion, so for now do nothing so that we at least don't inadvertantly harm our users.

BUG=154806
TEST=go through 1st run of Chrome on Windows 8, choose IE from the "How do you want to open webpages?" dialog, then confirm that HKCU\Software\Classes\.html doesn't point to ChromeHTML.<anything>.

Review URL: https://chromiumcodereview.appspot.com/11094081

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@161406 0039d316-1c4b-4281-b951-d872f2087c98

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