MacViews: Fix behavior of move and select commands when selection direction changes.

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 100 matching lines @@
   // If there is composition text, it'll be deleted instead.
   bool Backspace(bool add_to_kill_buffer = false);
 
   // Cursor related methods.
 
   // Returns the current cursor position.
   size_t GetCursorPosition() const;
 
   // Moves the cursor, see RenderText for additional details.
   // The current composition text will be confirmed.
-  void MoveCursor(gfx::BreakType break_type,
-                  gfx::VisualCursorDirection direction,
-                  bool select);
+  void MoveCursor(
+      gfx::BreakType break_type,
+      gfx::VisualCursorDirection direction,
+      bool select,
+      gfx::SelectionReversedBehavior select_behavior = gfx::SELECTION_DEFAULT);
 
   // 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);
 
   // Selection related methods.
 
@@ skipping 176 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_