Update touch selection notification names, add ESTABLISHED.

ui/touch_selection/touch_selection_controller.cc

 // 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.
 
 #include "ui/touch_selection/touch_selection_controller.h"
 
 #include "base/auto_reset.h"
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
 
@@ skipping 62 matching lines @@
 
 TouchSelectionController::~TouchSelectionController() {
 }
 
 void TouchSelectionController::OnSelectionBoundsChanged(
     const SelectionBound& start,
     const SelectionBound& end) {
   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());
   end_orientation_ = ToTouchHandleOrientation(end_.type());
   force_next_update_ = false;
 
   if (!activate_selection_automatically_ &&
       !activate_insertion_automatically_) {
     DCHECK_EQ(INACTIVE, active_status_);
     DCHECK_EQ(INPUT_EVENT_TYPE_NONE, response_pending_input_event_);
@@ skipping 495 matching lines @@
     base::TimeDelta duration = base::TimeTicks::Now() - selection_start_time_;
     UMA_HISTOGRAM_CUSTOM_TIMES("Event.TouchSelection.WasDraggedDuration",
                                duration,
                                base::TimeDelta::FromMilliseconds(500),
                                base::TimeDelta::FromSeconds(60),
                                60);
   }
 }
 
 }  // namespace ui