Description: Fire dragend event during the drag and drop processing
Test Result Test Assertion
Manual Test passes if if the word "PASS" appears to the left after following the steps below.
Steps:
  1. Drag the blue image
  2. Drop it on the green box

http://dev.w3.org/html5/spec/dnd.html#drag-and-drop-processing-model

If the drag operation failed or succeeded, fire a DND event named dragend at the source node.