Consume entire touch sequence in touch selection controller

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 dd1e70eb88ef257960241c3f3376b9f834fd29bc..e7126a3d3227ec9d29417f3bbc9ba16408908d85 100644
--- a/ui/touch_selection/touch_selection_controller.h
+++ b/ui/touch_selection/touch_selection_controller.h
@@ -150,6 +150,8 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
 
   enum InputEventType { TAP, REPEATED_TAP, LONG_PRESS, INPUT_EVENT_TYPE_NONE };
 
+  bool WillHandleTouchEventImpl(const MotionEvent& event);
+
   // TouchHandleClient implementation.
   void OnDragBegin(const TouchSelectionDraggable& draggable,
                    const gfx::PointF& drag_position) override;
@@ -240,6 +242,9 @@ class UI_TOUCH_SELECTION_EXPORT TouchSelectionController
   // session' - i.e. since the current selection has been activated.
   bool selection_handle_dragged_;
 
+  // Determines whether the entire touch sequence should be consumed or not.
+  bool consume_touch_sequence_;
+
   DISALLOW_COPY_AND_ASSIGN(TouchSelectionController);
 };