Revert 231053 "Device monitor Mac bug corrected when removing au..."

Patch reverted by request of the author.

> Device monitor Mac bug corrected when removing audio.
> 
> Silly typo made it test twice for video removal :(
> 
> Please refer to bug for details on testing.
> 
> BUG=311255
> 
> Review URL: https://codereview.chromium.org/43633002

TBR=mcasas@chromium.org

Review URL: https://codereview.chromium.org/54903002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232126 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232126
Update perf estimate for x86-64 to be more realistic/conservative.

I re-ran full benchmarks and got the same results, except x86-64 was a tad slower.

R= eliben@chromium.org
NOTRY=true
BUG= https://code.google.com/p/nativeclient/issues/detail?id=3634

Review URL: https://codereview.chromium.org/53923002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232127 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 232127