Chrome Version       : 47.0.2526.111
URLs (if applicable) :
Other browsers tested:
  Add OK or FAIL, along with the version, after other browsers where you
have tested this issue:
     Safari:
    Firefox:
         IE:

What steps will reproduce the problem?
(1)Open a tab with some video playing in the tab
(2)Mute the tab by clicking on volume icon
(3)Close the tab by clicking scroll key (middle key) on the mouse any where on the tab.

What is the expected result?

Tab should close without playing any sound
What happens instead?
Tab closes but it plays a sound when it is closing

Please provide any additional information below. Attach a screenshot if
possible.