Fix X11DesktopHandler::ActivateWindow on Unity for known user gestures

ui/base/base_window.h

Index: ui/base/base_window.h
diff --git a/ui/base/base_window.h b/ui/base/base_window.h
index 1819405fb4b9b065689a4f1ee4dabdbc5e4f2597..fe81e88618ae4b3d5ac1e59114c8d417945bbc6c 100644
--- a/ui/base/base_window.h
+++ b/ui/base/base_window.h
@@ -54,6 +54,8 @@ class UI_BASE_EXPORT BaseWindow {
 
   // 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;
@@ -69,6 +71,8 @@ class UI_BASE_EXPORT BaseWindow {
   // 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.