[Android] Allow custom ActionMode creation via ContentViewClient

ui/touch_selection/touch_handle.h

Index: ui/touch_selection/touch_handle.h
diff --git a/ui/touch_selection/touch_handle.h b/ui/touch_selection/touch_handle.h
index 12c66d09983626db3c3f9b4a356aa80a2a9d9178..f46a07fd761e2ee34b5dde89632cc42364e0746f 100644
--- a/ui/touch_selection/touch_handle.h
+++ b/ui/touch_selection/touch_handle.h
@@ -84,6 +84,11 @@ class UI_TOUCH_SELECTION_EXPORT TouchHandle {
   // Returns true if an animation is active and requires further ticking.
   bool Animate(base::TimeTicks frame_time);
 
+  // Get the visible bounds of the handle, based on the current position and
+  // the drawable's size/orientation. If the handle is invisible or disabled,
+  // the bounds will be empty.
+  gfx::RectF GetVisibleBounds() const;
+
   bool is_dragging() const { return is_dragging_; }
   const gfx::PointF& position() const { return position_; }
   TouchHandleOrientation orientation() const { return orientation_; }