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..cf222421548f70fc76589aa7948556044e2bd32e 100644
--- a/ui/views/touchui/touch_selection_controller_impl.h
+++ b/ui/views/touchui/touch_selection_controller_impl.h
@@ -7,7 +7,6 @@
 
 #include "base/macros.h"
 #include "base/timer/timer.h"
-#include "ui/aura/window_observer.h"
 #include "ui/base/touch/touch_editing_controller.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/selection_bound.h"
@@ -29,7 +28,6 @@ class WidgetTestInteractive;
 class VIEWS_EXPORT TouchSelectionControllerImpl
     : public ui::TouchEditingControllerDeprecated,
       public ui::TouchSelectionMenuClient,
-      public aura::WindowObserver,
       public WidgetObserver,
       public ui::EventHandler {
  public:
@@ -77,10 +75,6 @@ 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.