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Adds a NonClientFrameView for generic toplevel windows.Also adds a feeble (but better than what there was) attempt at sometimes updating the cursor. Will have to be replaced by a better system, but it's a start.http://crbug.com/97247TEST=none
Review URL: http://codereview.chromium.org/7977012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@102312 0039d316-1c4b-4281-b951-d872f2087c98