WebUI: Move chromeos webui files to ui/webui/chromeos directory.

Moving the files found with:

$ ls chrome/browser/chromeos/webui | grep ui

BUG=76120
TEST=None

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Review URL: http://codereview.chromium.org/6696063

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@79278 0039d316-1c4b-4281-b951-d872f2087c98
16 files changed