mash: Migrate tray audio and deps to common.

ash/mus/bridge/wm_shell_mus.cc

Index: ash/mus/bridge/wm_shell_mus.cc
diff --git a/ash/mus/bridge/wm_shell_mus.cc b/ash/mus/bridge/wm_shell_mus.cc
index 2eb8244f4595cf75df212f0633d2ed8c07892e00..0cba26cc5d913393ba86b6cd0519d972127d9ff9 100644
--- a/ash/mus/bridge/wm_shell_mus.cc
+++ b/ash/mus/bridge/wm_shell_mus.cc
@@ -5,6 +5,7 @@
 #include "ash/mus/bridge/wm_shell_mus.h"
 
 #include "ash/common/default_accessibility_delegate.h"
+#include "ash/common/display/display_info.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shell_observer.h"
 #include "ash/common/shell_window_ids.h"
@@ -177,6 +178,12 @@ WmWindow* WmShellMus::GetRootWindowForNewWindows() {
   return root_window_controllers_[0]->GetWindow();
 }
 
+const DisplayInfo& WmShellMus::GetDisplayInfo(int64_t display_id) const {
+  NOTIMPLEMENTED();
+  static DisplayInfo fake_info;
+  return fake_info;
+}
+
 bool WmShellMus::IsForceMaximizeOnFirstRun() {
   NOTIMPLEMENTED();
   return false;