SearchBoxView now enables/disables cursor based on user interaction.

ui/views/controls/textfield/textfield_controller.h

 // Copyright (c) 2012 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.
 
 #ifndef UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_CONTROLLER_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_CONTROLLER_H_
 
 #include <set>
 
 #include "base/strings/string16.h"
@@ skipping 13 matching lines @@
 // This defines the callback interface for other code to be notified of changes
 // in the state of a text field.
 class VIEWS_EXPORT TextfieldController {
  public:
   // This method is called whenever the text in the field is changed by the
   // user. It won't be called if the text is changed by calling
   // Textfield::SetText() or Textfield::AppendText().
   virtual void ContentsChanged(Textfield* sender,
                                const base::string16& new_contents) {}
 
-  // This method is called to get notified about keystrokes in the edit.
+  // Called to get notified about keystrokes in the edit.
   // Returns true if the message was handled and should not be processed
   // further. If it returns false the processing continues.
   virtual bool HandleKeyEvent(Textfield* sender,
                               const ui::KeyEvent& key_event);
 
-  // This method is called to get notified about mouse events in the edit.
+  // Called to get notified about mouse events in the edit.
   // Returns true if the message was handled and should not be processed
   // further. Currently, only mouse down events are sent here.
   virtual bool HandleMouseEvent(Textfield* sender,
                                 const ui::MouseEvent& mouse_event);
 
+  // Called to notify that a gesture event has occured in the
+  // textfield. Currently, only tap events are sent here.
+  virtual void NotifyOnGestureEvent();

[vadimt, 2017/06/22 22:47:41]

"OnGesture() {}"
Note curlies here.

[newcomer, 2017/06/23 23:59:37]

Refactored as a side effect.

+
   // Called before performing a user action that may change the textfield.
   // It's currently only supported by Views implementation.
   virtual void OnBeforeUserAction(Textfield* sender) {}
 
   // Called after performing a user action that may change the textfield.
   // It's currently only supported by Views implementation.
   virtual void OnAfterUserAction(Textfield* sender) {}
 
   // Called after performing a Cut or Copy operation.
   virtual void OnAfterCutOrCopy(ui::ClipboardType clipboard_type) {}
@@ skipping 23 matching lines @@
   // Gives the controller a chance to modify the context menu contents.
   virtual void UpdateContextMenu(ui::SimpleMenuModel* menu_contents) {}
 
  protected:
   virtual ~TextfieldController() {}
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_CONTROLLER_H_