Fix typo in AudioStreamIndicator from r182364 causing hangs.

NOTRY=true
TBR=sky,bauerb

Review URL: https://chromiumcodereview.appspot.com/12260035

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@182401 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/media/audio_stream_indicator.cc

@@ -64,7 +64,7 @@ void AudioStreamIndicator::UpdateWebContentsStatusOnUIThread(
   } else {
     std::map<RenderViewId, std::set<int> >::iterator it =
         audio_streams_.find(id);
-    if (it != audio_streams_.end())
+    if (it == audio_streams_.end())
       return;
 
     it->second.erase(stream_id);