Swap touch selection handles when they are interchanged

ui/touch_selection/touch_selection_controller.h

 // Copyright 2014 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_TOUCH_SELECTION_TOUCH_SELECTION_CONTROLLER_H_
 #define UI_TOUCH_SELECTION_TOUCH_SELECTION_CONTROLLER_H_
 
 #include "base/time/time.h"
 #include "ui/base/touch/selection_bound.h"
 #include "ui/gfx/geometry/point_f.h"
@@ skipping 169 matching lines @@
   void UpdateHandleLayoutIfNecessary();
 
   bool WillHandleTouchEventForLongPressDrag(const MotionEvent& event);
   void SetTemporarilyHiddenForLongPressDrag(bool hidden);
   void RefreshHandleVisibility();
 
   gfx::Vector2dF GetStartLineOffset() const;
   gfx::Vector2dF GetEndLineOffset() const;
   bool GetStartVisible() const;
   bool GetEndVisible() const;
+  TouchHandleOrientation GetStartHandleOrientation() const;
+  TouchHandleOrientation GetEndHandleOrientation() const;
   TouchHandle::AnimationStyle GetAnimationStyle(bool was_active) const;
 
   void LogSelectionEnd();
 
   TouchSelectionControllerClient* const client_;
   const Config config_;
 
   // Whether to force an update on the next selection event even if the
   // cached selection matches the new selection.
   bool force_next_update_;
@@ skipping 34 matching lines @@
   // Whether a selection handle was dragged during the current 'selection
   // session' - i.e. since the current selection has been activated.
   bool selection_handle_dragged_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchSelectionController);
 };
 
 }  // namespace ui
 
 #endif  // UI_TOUCH_SELECTION_TOUCH_SELECTION_CONTROLLER_H_