Fix X11DesktopHandler::ActivateWindow on Unity for known user gestures

ui/views/widget/widget.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_VIEWS_WIDGET_WIDGET_H_
 #define UI_VIEWS_WIDGET_WIDGET_H_
 
 #include <set>
 #include <stack>
 #include <vector>
@@ skipping 466 matching lines @@
   // can_activate flag in the InitParams structure is set to true.
   virtual void Show();
   // Hides the widget.
   void Hide();
 
   // Like Show(), but does not activate the window.
   void ShowInactive();
 
   // Activates the widget, assuming it already exists and is visible.
   void Activate();
+  // Like Activate(), but some window managers will give this higher priority.
+  void ActivateForUserGesture();
 
   // Deactivates the widget, making the next window in the Z order the active
   // window.
   void Deactivate();
 
   // Returns whether the Widget is the currently active window.
   virtual bool IsActive() const;
 
   // Prevents the window from being rendered as deactivated. This state is
   // reset automatically as soon as the window becomes activated again. There is
@@ skipping 481 matching lines @@
   bool movement_disabled_;
 
   ScopedObserver<ui::NativeTheme, ui::NativeThemeObserver> observer_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(Widget);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_WIDGET_H_