aw: Ensure synchronization of PopupWindow handle visibility/position

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 "ui/base/touch/selection_bound.h"
 #include "ui/gfx/geometry/point_f.h"
 #include "ui/gfx/geometry/rect_f.h"
@@ skipping 111 matching lines @@
   base::TimeDelta GetTapTimeout() const override;
   float GetTapSlop() const override;
 
   void ShowInsertionHandleAutomatically();
   void ShowSelectionHandlesAutomatically();
   bool WillHandleTapOrLongPress(const gfx::PointF& location);
 
   void OnInsertionChanged();
   void OnSelectionChanged();
 
-  void ActivateInsertion();
+  // Returns true if insertion mode was newly (re)activated.
+  bool ActivateInsertionIfNecessary();
   void DeactivateInsertion();
-  void ActivateSelection();
+  // Returns true if selection mode was newly (re)activated.
+  bool ActivateSelectionIfNecessary();
   void DeactivateSelection();
   void ForceNextUpdateIfInactive();
 
   gfx::Vector2dF GetStartLineOffset() const;
   gfx::Vector2dF GetEndLineOffset() const;
   bool GetStartVisible() const;
   bool GetEndVisible() const;
   TouchHandle::AnimationStyle GetAnimationStyle(bool was_active) const;
 
   void LogSelectionEnd();
@@ skipping 35 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_