Remove TOGGLE_MAXIMIZED_* from Ash reserved actions list.

ash/shell_delegate.h

Index: ash/shell_delegate.h
diff --git a/ash/shell_delegate.h b/ash/shell_delegate.h
index 92ec386373e0573150da744c921ab2459947ba14..ae5cfb9d0fdd0eb9866a8345d852021e3b71d5f3 100644
--- a/ash/shell_delegate.h
+++ b/ash/shell_delegate.h
@@ -90,6 +90,10 @@ class ASH_EXPORT ShellDelegate {
   // Invoked when the user uses Ctrl-N or Ctrl-Shift-N to open a new window.
   virtual void NewWindow(bool incognito) = 0;
 
+  // Invoked when the user uses F4 to toggle window maximized state.
+  // When in fullscreen mode, it gets out of fullscreen.
+  virtual void ToggleMaximized() = 0;
+
   // Invoked when the user uses Ctrl-M or Ctrl-O to open file manager.
   virtual void OpenFileManager(bool as_dialog) = 0;