Add user_gesture param to BaseWindow::Show

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 1913e57480803e9a920f9b3d64441aac45e405f5..925ce2e92be6d64ebe0dff4b018504327881a0da 100644
--- a/ui/base/base_window.h
+++ b/ui/base/base_window.h
@@ -53,7 +53,7 @@ class UI_BASE_EXPORT BaseWindow {
   virtual gfx::Rect GetBounds() const = 0;
 
   // Shows the window, or activates it if it's already visible.
-  virtual void Show() = 0;
+  virtual void Show(bool user_gesture) = 0;
 
   // Hides the window.
   virtual void Hide() = 0;