Remove TOGGLE_MAXIMIZED_* from Ash reserved actions list.

ash/shell/shell_delegate_impl.cc

Index: ash/shell/shell_delegate_impl.cc
diff --git a/ash/shell/shell_delegate_impl.cc b/ash/shell/shell_delegate_impl.cc
index ca2696d9a1953efafab319b3c77cf9b7e99efb49..93cad7f3286e7a289df682a5f454270e6b6e8705 100644
--- a/ash/shell/shell_delegate_impl.cc
+++ b/ash/shell/shell_delegate_impl.cc
@@ -9,6 +9,7 @@
 #include "ash/shell/launcher_delegate_impl.h"
 #include "ash/shell/toplevel_window.h"
 #include "ash/shell_window_ids.h"
+#include "ash/wm/window_util.h"
 #include "base/message_loop.h"
 #include "ui/aura/window.h"
 
@@ -75,6 +76,12 @@ void ShellDelegateImpl::NewWindow(bool incognito) {
   ash::shell::ToplevelWindow::CreateToplevelWindow(create_params);
 }
 
+void ShellDelegateImpl::ToggleMaximized() {
+  aura::Window* window = ash::wm::GetActiveWindow();
+  if (window)
+    ash::wm::ToggleMaximizedWindow(window);
+}
+
 void ShellDelegateImpl::OpenFileManager(bool as_dialog) {
 }