The sound disabled picture is different. Other sound disabled picture are not needed any longer.

Patch by silviapf@chromium.org:
https://chromiumcodereview.appspot.com/10540174/

BUG=88489
TEST=none

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@142341 0039d316-1c4b-4281-b951-d872f2087c98