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..e93bc089e1abf119ea3aac4e4d4a81ea8fe7500f 100644
--- a/ui/touch_selection/touch_selection_controller.cc
+++ b/ui/touch_selection/touch_selection_controller.cc
@@ -132,6 +132,10 @@ void TouchSelectionController::OnSelectionBoundsChanged(
     return;
   }
 
+  if (start_orientation_ == TouchHandleOrientation::UNDEFINED) {

[jdduke (slow), 2015/07/15 20:33:24]

I'm confused, why would we try to activate insertion if the renderer reports
that there is no insertion point?

[Donn Denman, 2015/07/15 20:48:03]

For a tap-triggered selection there are no handles, so the handle orientation is
undefined.  However, the selection has changed to an insertion, so notification
is important (at least to fix the flaky CS instrumentation tests).  Maybe adding
a comment like the above would help?  Having this notification may allow us to
deprecate the OnSingleTap API too (hoping to check after landing this).

+    OnInsertionChanged();
+  }
+
   HideAndDisallowShowingAutomatically();
 }