Revert 260298 "Revert 260222 "Separate audio player tests from s..."

Revert 260298 "Revert 260222 "Separate audio player tests from s..."

Undoing the revert, since MultiProfileFileManagerBrowserTest failure was
caused by Blink 170311 instead.  Sorry for the disruption.

> Revert 260222 "Separate audio player tests from special file tes..."
> 
> Still trying to track down cause of MultiProfileFileManagerBrowserTest failures:
> http://build.chromium.org/p/chromium.chromiumos/builders/Linux%20ChromiumOS%20Tests%20%282%29/builds/22674
> 
> 
> > Separate audio player tests from special file test of Files.app (2nd)
> > 
> > I have a plan to add more audio player tests. Before that, make audio player tests
> > separated for readability.
> > 
> > This is the 2nd (last) part of the work of crrev.com/214463002. First part is committed as crrev.com/260069.
> > 
> > BUG=none
> > TEST=browser_test passes
> > TBR=hirino@chromium.org
> > 
> > Review URL: https://codereview.chromium.org/212123008
> 
> TBR=yoshiki@chromium.org
> 
> Review URL: https://codereview.chromium.org/217743002

TBR=yoshiki@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=260327

[Charlie Reis, 2014-03-29 01:05:29]

Committed patchset #1 manually as r260327.