Framework to display disabled mute button when audio fails....

media/base/pipeline_impl.cc

Index: media/base/pipeline_impl.cc
===================================================================
--- media/base/pipeline_impl.cc	(revision 23449)
+++ media/base/pipeline_impl.cc	(working copy)
@@ -688,6 +688,11 @@
 void PipelineImpl::BroadcastMessageTask(FilterMessage message) {
   DCHECK_EQ(MessageLoop::current(), message_loop_);
 
+  // TODO(kylep): This is a horribly ugly hack, but we have no better way to log
+  // that audio is not and will not be working.

[awong, 2009/08/14 20:33:10]

File a bug about this and put the bug number into the comment.  Place on
MStone:4.

[kylep, 2009/08/14 20:48:02]

Bug filed: http://crbug.com/19384

+  if (message == media::kMsgDisableAudio)
+    rendered_mime_types_.erase(mime_type::kMajorTypeAudio);

[scherkus (not reviewing), 2009/08/14 20:34:44]

is this valid?

I think erase takes an iterator, but I could be wrong... I always forget which
operations take iterator vs. value

[kylep, 2009/08/14 20:48:02]

Yeah, I looked it up. It takes either an iterator or the element you want to
erase.

[scherkus (not reviewing), 2009/08/14 22:28:17]

What if the element doesn't exist?  I have this feeling STL will explode.  Maybe
write a unit test ;)

+
   // Broadcast the message to all filters.
   for (FilterVector::iterator iter = filters_.begin();
        iter != filters_.end();