Fix Volume slider is captured in screenshot done in touchview mode

chromeos/dbus/fake_cras_audio_client.h

Index: chromeos/dbus/fake_cras_audio_client.h
diff --git a/chromeos/dbus/fake_cras_audio_client.h b/chromeos/dbus/fake_cras_audio_client.h
index 443085363c43cd1947e8608db35b17b3bae9a460..44e3e1ccd8693da00fe40923a5d24b0ecde31034 100644
--- a/chromeos/dbus/fake_cras_audio_client.h
+++ b/chromeos/dbus/fake_cras_audio_client.h
@@ -63,6 +63,9 @@ class CHROMEOS_EXPORT FakeCrasAudioClient : public CrasAudioClient {
   // Generates fake signal for OutputNodeVolumeChanged.
   void NotifyOutputNodeVolumeChangedForTesting(uint64_t node_id, int volume);
 
+  // Generates fake signal for AudioClientRestarted.
+  void NotifyAudioClientRestartedForTesting();
+
   const AudioNodeList& node_list() const { return node_list_; }
   const uint64_t& active_input_node_id() const { return active_input_node_id_; }
   const uint64_t& active_output_node_id() const {