[NOT FOR REVIEW] ash: Add some implementation for the window management extension API.

chrome/browser/ui/views/ash/chrome_shell_delegate.cc

Index: chrome/browser/ui/views/ash/chrome_shell_delegate.cc
diff --git a/chrome/browser/ui/views/ash/chrome_shell_delegate.cc b/chrome/browser/ui/views/ash/chrome_shell_delegate.cc
index 0ff7d1dbdb740a48b12f72a4bb87d7293ac78197..204e6b9ed02db4a9dcb6910da4614f20b7f05ec5 100644
--- a/chrome/browser/ui/views/ash/chrome_shell_delegate.cc
+++ b/chrome/browser/ui/views/ash/chrome_shell_delegate.cc
@@ -21,6 +21,7 @@
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/browser_finder.h"
+#include "chrome/browser/ui/ash/window_manager_extension.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "chrome/browser/ui/webui/chrome_web_contents_handler.h"
 #include "chrome/common/chrome_notification_types.h"
@@ -322,6 +323,11 @@ aura::client::UserActionClient* ChromeShellDelegate::CreateUserActionClient() {
   return new UserActionHandler;
 }
 
+ash::WindowManagerExtensionDelegate*
+ChromeShellDelegate::CreateWindowManagerDelegate() {
+  return new WindowManagerExtension();
+}
+
 void ChromeShellDelegate::OpenFeedbackPage() {
   chrome::OpenFeedbackDialog(GetTargetBrowser());
 }