Prevent selection handles from showing after a tap

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 155 matching lines @@
   activate_insertion_automatically_ = true;
   if (GetStartPosition() != GetEndPosition())
     OnSelectionChanged();
   else if (start_orientation_ == TouchHandleOrientation::CENTER &&
            selection_editable_)
     OnInsertionChanged();
 }
 
 void TouchSelectionController::OnTapEvent() {
   response_pending_input_event_ = TAP;
+  activate_selection_automatically_ = false;
   ShowInsertionHandleAutomatically();
   if (selection_empty_ && !show_on_tap_for_empty_editable_)
     DeactivateInsertion();
   ResetCachedValuesIfInactive();
 }
 
 void TouchSelectionController::HideAndDisallowShowingAutomatically() {
   response_pending_input_event_ = INPUT_EVENT_TYPE_NONE;
   DeactivateInsertion();
   DeactivateSelection();
@@ skipping 315 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