GitLab

In OSExchangeData, there's a difference between URLs and files. In the
mime type "text/uri-list", there isn't, and Linux usually uses the later
to exchange both data types.

This fixes dragging files onto several sites, like the HTML Five Wow
Terminal, but doesn't fix Dropbox, which seems to be failing somewhere
else.

BUG=317548

Review URL: https://codereview.chromium.org/129113004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@243840 0039d316-1c4b-4281-b951-d872f2087c98