Fix Volume slider is captured in screenshot done in touchview mode

chromeos/dbus/fake_cras_audio_client.cc

Index: chromeos/dbus/fake_cras_audio_client.cc
diff --git a/chromeos/dbus/fake_cras_audio_client.cc b/chromeos/dbus/fake_cras_audio_client.cc
index 3ee4c4d45a829f735ae5d2ba5c8aaf77da0a7cb8..23755bc676f66cc2e3ab1ca93c2d342a5e70c54b 100644
--- a/chromeos/dbus/fake_cras_audio_client.cc
+++ b/chromeos/dbus/fake_cras_audio_client.cc
@@ -227,6 +227,12 @@ void FakeCrasAudioClient::NotifyOutputNodeVolumeChangedForTesting(
                     OutputNodeVolumeChanged(node_id, volume));
 }
 
+void FakeCrasAudioClient::NotifyAudioClientRestartedForTesting(
+    const AudioNodeList& new_nodes) {
+  SetAudioNodesForTesting(new_nodes);
+  FOR_EACH_OBSERVER(Observer, observers_, AudioClientRestarted());
+}
+
 AudioNodeList::iterator FakeCrasAudioClient::FindNode(uint64_t node_id) {
   return std::find_if(
       node_list_.begin(), node_list_.end(),