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

ui/views/touchui/touch_selection_controller_impl.h

 // Copyright (c) 2013 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_UI_VIEWS_TOUCHUI_TOUCH_SELECTION_CONTROLLER_IMPL_H_
 #define UI_UI_VIEWS_TOUCHUI_TOUCH_SELECTION_CONTROLLER_IMPL_H_
 
 #include "base/macros.h"
 #include "base/timer/timer.h"
 #include "ui/aura/window_observer.h"
@@ skipping 11 matching lines @@
 namespace test {
 class WidgetTestInteractive;
 }
 
 // Touch specific implementation of TouchEditingControllerDeprecated.
 // Responsible for displaying selection handles and menu elements relevant in a
 // touch interface.
 class VIEWS_EXPORT TouchSelectionControllerImpl
     : public ui::TouchEditingControllerDeprecated,
       public ui::TouchSelectionMenuClient,
-      public aura::WindowObserver,
       public WidgetObserver,
       public ui::EventHandler {
  public:
   class EditingHandleView;
 
   // Use TextSelectionController::create().
   explicit TouchSelectionControllerImpl(
       ui::TouchEditable* client_view);
 
   ~TouchSelectionControllerImpl() override;
@@ skipping 27 matching lines @@
 
   // Checks if handle should be shown for selection bound.
   // |bound| should be the clipped version of the selection bound.
   bool ShouldShowHandleFor(const gfx::SelectionBound& bound) const;
 
   // Overridden from ui::TouchSelectionMenuClient.
   bool IsCommandIdEnabled(int command_id) const override;
   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.
   void OnWidgetClosing(Widget* widget) override;
   void OnWidgetBoundsChanged(Widget* widget,
                              const gfx::Rect& new_bounds) override;
 
   // Overriden from ui::EventHandler.
   void OnKeyEvent(ui::KeyEvent* event) override;
   void OnMouseEvent(ui::MouseEvent* event) override;
@@ skipping 54 matching lines @@
   // Selection bounds, clipped to client view's boundaries.
   gfx::SelectionBound selection_bound_1_clipped_;
   gfx::SelectionBound selection_bound_2_clipped_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchSelectionControllerImpl);
 };
 
 }  // namespace views
 
 #endif  // UI_UI_VIEWS_TOUCHUI_TOUCH_SELECTION_CONTROLLER_IMPL_H_