Update touch selection notification names, add ESTABLISHED.

ui/touch_selection/touch_selection_controller.cc

Index: ui/touch_selection/touch_selection_controller.cc
diff --git a/ui/touch_selection/touch_selection_controller.cc b/ui/touch_selection/touch_selection_controller.cc
index ea5db91a766055c25968c6ea1f9eec101dc2fe66..96577df31d24d28fb022089beabb31e2bb672e00 100644
--- a/ui/touch_selection/touch_selection_controller.cc
+++ b/ui/touch_selection/touch_selection_controller.cc
@@ -80,6 +80,15 @@ void TouchSelectionController::OnSelectionBoundsChanged(
   if (!force_next_update_ && start == start_ && end_ == end)
     return;
 
+  // Notify if selection bounds have just been established or dissolved.
+  if (start.type() != SelectionBound::EMPTY &&
+      start_.type() == SelectionBound::EMPTY) {
+    client_->OnSelectionEvent(BOUNDS_ESTABLISHED);
+  } else if (start.type() == SelectionBound::EMPTY &&
+      start_.type() != SelectionBound::EMPTY) {
+    client_->OnSelectionEvent(BOUNDS_DISSOLVED);
+  }
+
   start_ = start;
   end_ = end;
   start_orientation_ = ToTouchHandleOrientation(start_.type());