[tor-bugs] #10716 [Tor Browser]: Update drag-and-drop observer code to use DataTransfers

[Tor Bug Tracker & Wiki]

#10716: Update drag-and-drop observer code to use DataTransfers
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     Reporter:  gk       |      Owner:  gk
         Type:  defect   |     Status:  needs_review
     Priority:  major    |  Milestone:
    Component:  Tor      |    Version:
  Browser                |   Keywords:  ff31-esr, tbb-torbutton,
   Resolution:           |  TorBrowserTeam201409
Actual Points:           |  Parent ID:
       Points:           |
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Changes (by gk):

 * status:  assigned => needs_review


Comment:

 See bug_10716_v2 in my public Torbutton repo for the code t review.
 Surprisingly, there is no need to QI to nsIDOMDataTransfer. Rather, if we
 do this an exception is thrown.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/10716#comment:4>
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