AURA/X11: Handle VKEY_MENU accelerator on content area

ui/views/focus/focus_manager.h

Index: ui/views/focus/focus_manager.h
diff --git a/ui/views/focus/focus_manager.h b/ui/views/focus/focus_manager.h
index 0cb4671d4c9b38386ea6421ebfcdf4f1bc095b7f..666fd4f55ab56cd0bfbcae43e90301d74ff72330 100644
--- a/ui/views/focus/focus_manager.h
+++ b/ui/views/focus/focus_manager.h
@@ -213,6 +213,15 @@ class VIEWS_EXPORT FocusManager {
   // Returns true if an accelerator was activated.
   bool ProcessAccelerator(const ui::Accelerator& accelerator);
 
+  // Resets menu key state if |event| is not menu key release.
+  // This is effective only on x11.
+  void MaybeResetMenuKeyState(const KeyEvent& key);
+
+#if defined(TOOLKIT_USES_GTK)
+  // Resets menu key state. TODO(oshima): Remove this when views/gtk is removed.
+  void ResetMenuKeyState();
+#endif
+
   // Called by a RootView when a view within its hierarchy is removed
   // from its parent. This will only be called by a RootView in a
   // hierarchy of Widgets that this FocusManager is attached to the
@@ -269,6 +278,11 @@ class VIEWS_EXPORT FocusManager {
   // The list of registered FocusChange listeners.
   ObserverList<FocusChangeListener, true> focus_change_listeners_;
 
+#if defined(USE_X11)
+  // Indicates if we should handle the upcoming Alt key release event.
+  bool should_handle_menu_key_release_;
+#endif
+
   // See description above getter.
   bool is_changing_focus_;