Fix X11DesktopHandler::ActivateWindow on Unity for known user gestures

ui/base/base_window.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_BASE_BASE_WINDOW_H_
 #define UI_BASE_BASE_WINDOW_H_
 
 #include "base/compiler_specific.h"
 #include "ui/base/ui_base_types.h"  // WindowShowState
 #include "ui/gfx/native_widget_types.h"
@@ skipping 36 matching lines @@
   // Returns the restore state for the window (platform dependent).
   virtual ui::WindowShowState GetRestoredState() const = 0;
 
   // Retrieves the window's current bounds, including its window.
   // This will only differ from GetRestoredBounds() for maximized
   // and minimized windows.
   virtual gfx::Rect GetBounds() const = 0;
 
   // Shows the window, or activates it if it's already visible.
   virtual void Show() = 0;
+  // Like Show(), but some window managers will give this higher priority.
+  virtual void ShowForUserGesture();
 
   // Hides the window.
   virtual void Hide() = 0;
 
   // Show the window, but do not activate it. Does nothing if window
   // is already visible.
   virtual void ShowInactive() = 0;
 
   // Closes the window as soon as possible. The close action may be delayed
   // if an operation is in progress (e.g. a drag operation).
   virtual void Close() = 0;
 
   // Activates (brings to front) the window. Restores the window from minimized
   // state if necessary.
   virtual void Activate() = 0;
+  // Like Activate(), but some window managers will give this higher priority.
+  virtual void ActivateForUserGesture();
 
   // Deactivates the window, making the next window in the Z order the active
   // window.
   virtual void Deactivate() = 0;
 
   // Maximizes/minimizes/restores the window.
   virtual void Maximize() = 0;
   virtual void Minimize() = 0;
   virtual void Restore() = 0;
 
   // Sets the window's size and position to the specified values.
   virtual void SetBounds(const gfx::Rect& bounds) = 0;
 
   // Flashes the taskbar item associated with this window.
   // Set |flash| to true to initiate flashing, false to stop flashing.
   virtual void FlashFrame(bool flash) = 0;
 
   // Returns true if a window is set to be always on top.
   virtual bool IsAlwaysOnTop() const = 0;
 
   // If set to true, the window will stay on top of other windows which do not
   // have this flag enabled.
   virtual void SetAlwaysOnTop(bool always_on_top) = 0;
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_BASE_WINDOW_H_