Improve validation when creating audio streams.

BUG=166795
Review URL: https://codereview.chromium.org/11647012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@173981 0039d316-1c4b-4281-b951-d872f2087c98
void AudioRendererHost::OnAssociateStreamWithProducer(int stream_id,
                                                      int render_view_id) {
  DVLOG(1) << "AudioRendererHost@" << this
           << "::OnAssociateStreamWithProducer(stream_id=" << stream_id
           << ", render_view_id=" << render_view_id << ")";
}

void AudioRendererHost::OnAssociateStreamWithProducer(int stream_id,
                                                      int render_view_id) {
  DVLOG(1) << "AudioRendererHost@" << this
           << "::OnAssociateStreamWithProducer(stream_id=" << stream_id
           << ", render_view_id=" << render_view_id << ")";
}
