mash: Migrate tray audio and deps to common.

ash/aura/wm_shell_aura.cc

Index: ash/aura/wm_shell_aura.cc
diff --git a/ash/aura/wm_shell_aura.cc b/ash/aura/wm_shell_aura.cc
index 3c82294a8dcb130b7b1e386127de38a892f61662..b1d4951d9491a676db1901977876b4a8c89688ec 100644
--- a/ash/aura/wm_shell_aura.cc
+++ b/ash/aura/wm_shell_aura.cc
@@ -11,6 +11,7 @@
 #include "ash/common/wm_activation_observer.h"
 #include "ash/common/wm_display_observer.h"
 #include "ash/common/wm_shell_common.h"
+#include "ash/display/display_manager.h"
 #include "ash/display/window_tree_host_manager.h"
 #include "ash/shell.h"
 #include "ash/shell_delegate.h"
@@ -79,6 +80,9 @@ WmWindow* WmShellAura::GetRootWindowForNewWindows() {
   return WmWindowAura::Get(Shell::GetTargetRootWindow());
 }
 
+const DisplayInfo& WmShellAura::GetDisplayInfo(int64_t display_id) const {
+  return Shell::GetInstance()->display_manager()->GetDisplayInfo(display_id);
+}
 
 bool WmShellAura::IsForceMaximizeOnFirstRun() {
   return Shell::GetInstance()->delegate()->IsForceMaximizeOnFirstRun();