Fix the content_browsertests everywhere maybe.

chrome/browser/ui/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/ash/chrome_shell_delegate.cc b/chrome/browser/ui/ash/chrome_shell_delegate.cc
index d994640b113149352234cd54a501ca469ee398e6..bcbd5562319250923fa48bf2422bd44035c3253d 100644
--- a/chrome/browser/ui/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/ash/chrome_shell_delegate.cc
@@ -8,7 +8,6 @@
 #include "ash/launcher/launcher_types.h"
 #include "ash/magnifier/magnifier_constants.h"
 #include "ash/system/tray/system_tray_delegate.h"
-#include "ash/wm/stacking_controller.h"
 #include "ash/wm/window_properties.h"
 #include "ash/wm/window_util.h"
 #include "base/bind.h"
@@ -562,10 +561,6 @@ ui::MenuModel* ChromeShellDelegate::CreateContextMenu(aura::RootWindow* root) {
   return new LauncherContextMenu(launcher_delegate_, root);
 }
 
-aura::client::StackingClient* ChromeShellDelegate::CreateStackingClient() {
-  return new ash::StackingController;
-}
-
 ash::RootWindowHostFactory* ChromeShellDelegate::CreateRootWindowHostFactory() {
   return ash::RootWindowHostFactory::Create();
 }