Close the URL request in the destroctor. This ensures the load is actually stopped when the request is deleted.
Close the URL request in the destroctor. This ensures the load is actually
stopped when the request is deleted.

TEST=manual
BUG=84765
Review URL: http://codereview.chromium.org/7491046

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@93987 0039d316-1c4b-4281-b951-d872f2087c98

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