touch ui: Do not hide text selection handles when screen is rotated.

ui/views/touchui/touch_selection_controller_impl.h

Index: ui/views/touchui/touch_selection_controller_impl.h
diff --git a/ui/views/touchui/touch_selection_controller_impl.h b/ui/views/touchui/touch_selection_controller_impl.h
index aa32e5f8f4841ddd9da2ec05f7230c46674c47a8..c1f530f052e2d3b6cf4fa0baa175ea96e26812e1 100644
--- a/ui/views/touchui/touch_selection_controller_impl.h
+++ b/ui/views/touchui/touch_selection_controller_impl.h
@@ -29,7 +29,6 @@ class WidgetTestInteractive;
 class VIEWS_EXPORT TouchSelectionControllerImpl
     : public ui::TouchEditingControllerDeprecated,
       public ui::TouchSelectionMenuClient,
-      public aura::WindowObserver,
       public WidgetObserver,
       public ui::EventHandler {
  public:
@@ -77,10 +76,6 @@ class VIEWS_EXPORT TouchSelectionControllerImpl
   void ExecuteCommand(int command_id, int event_flags) override;
   void RunContextMenu() override;
 
-  // Overriden from aura::WindowObserver.
-  void OnAncestorWindowTransformed(aura::Window* source,
-                                   aura::Window* window) override;
-
   // Overridden from WidgetObserver. We will observe the widget backing the
   // |client_view_| so that when its moved/resized, we can update the selection
   // handles appropriately.