views: support vertical-drag-to-end on textfields

ui/views/controls/textfield/textfield_model.h

 // 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.
 
 #ifndef UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_MODEL_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_MODEL_H_
 
 #include <stddef.h>
 
 #include <list>
@@ skipping 105 matching lines @@
                   gfx::VisualCursorDirection direction,
                   bool select);
 
   // Updates the cursor to the specified selection model. Any composition text
   // will be confirmed, which may alter the specified selection range start.
   bool MoveCursorTo(const gfx::SelectionModel& cursor);
 
   // Helper function to call MoveCursorTo on the TextfieldModel.
   bool MoveCursorTo(const gfx::Point& point, bool select);
 
+  // Helper functions to move the cursor to the start and end.
+  void MoveCursorToStart(bool select);

[tapted, 2016/04/06 23:29:38]

nit `select` is always in this code, so in Chrome's
don't-add-it-till-you-need-it methodology, it shouldn't be passed in yet

[Elly Fong-Jones, 2016/04/07 17:43:47]

Removed these methods.

+  void MoveCursorToEnd(bool select);
+
   // Selection related methods.
 
   // Returns the selected text.
   base::string16 GetSelectedText() const;
 
   // The current composition text will be confirmed. The selection starts with
   // the range's start position, and ends with the range's end position,
   // therefore the cursor position becomes the end position.
   void SelectRange(const gfx::Range& range);
 
@@ skipping 153 matching lines @@
   //   2) new edit is added. (redo history is cleared)
   //   3) redone all undone edits.
   EditHistory::iterator current_edit_;
 
   DISALLOW_COPY_AND_ASSIGN(TextfieldModel);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_MODEL_H_