Support for Adaptive Handle Orientation

ui/touch_selection/touch_selection_controller.h

Index: ui/touch_selection/touch_selection_controller.h
diff --git a/ui/touch_selection/touch_selection_controller.h b/ui/touch_selection/touch_selection_controller.h
index 7ec25d1d442e6d13bbdcb9c7990f4e61120e039d..fe8823d97a8d05fea37e40f7fea2358214214b72 100644
--- a/ui/touch_selection/touch_selection_controller.h
+++ b/ui/touch_selection/touch_selection_controller.h
@@ -54,6 +54,10 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
   void OnSelectionBoundsChanged(const SelectionBound& start,
                                 const SelectionBound& end);
 
+  // To be called when the viewport rect has been changed. This is used for
+  // setting the state of the handles.
+  void OnViewportChanged(const gfx::RectF viewport_rect);
+
   // Allows touch-dragging of the handle.
   // Returns true iff the event was consumed, in which case the caller should
   // cease further handling of the event.
@@ -176,6 +180,8 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
 
   bool temporarily_hidden_;
 
+  gfx::RectF viewport_rect_;
+
   base::TimeTicks selection_start_time_;
   // Whether a selection handle was dragged during the current 'selection
   // session' - i.e. since the current selection has been activated.