Make NativeTextfieldViews update the win system caret.

ui/views/controls/textfield/native_textfield_views.h

 // Copyright (c) 2013 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_NATIVE_TEXTFIELD_VIEWS_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_VIEWS_H_
 
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
 #include "base/timer/timer.h"
@@ skipping 270 matching lines @@
 
   void CreateTouchSelectionControllerAndNotifyIt();
 
   // Platform specific gesture event handling.
   void PlatformGestureEventHandling(const ui::GestureEvent* event);
 
   // Reveals the obscured char at |index| for the given |duration|. If |index|
   // is -1, existing revealed index will be cleared.
   void RevealObscuredChar(int index, const base::TimeDelta& duration);
 
+  // Platform-specific updating of the system caret location to match ours.
+  void PlatformUpdateSystemCaret();
+
+  // Platform-specific hiding of the system caret whe we lose focus.
+  void PlatformHideSystemCaret();
+
   // The parent textfield, the owner of this object.
   Textfield* textfield_;
 
   // The text model.
   scoped_ptr<TextfieldViewsModel> model_;
 
   // The focusable border.  This is always non-NULL, but may not actually be
   // drawn.  If it is not drawn, then by default it's also zero-sized unless the
   // Textfield has explicitly-set margins.
   FocusableBorder* text_border_;
@@ skipping 26 matching lines @@
   scoped_ptr<views::MenuModelAdapter> context_menu_delegate_;
   scoped_ptr<views::MenuRunner> context_menu_runner_;
 
   scoped_ptr<ui::TouchSelectionController> touch_selection_controller_;
 
   // A timer to control the duration of showing the last typed char in
   // obscured text. When the timer is running, the last typed char is shown
   // and when the time expires, the last typed char is obscured.
   base::OneShotTimer<NativeTextfieldViews> obscured_reveal_timer_;
 
+  // The last caret rect, in screen coordinates.
+  gfx::Rect last_caret_rect_;
+
   DISALLOW_COPY_AND_ASSIGN(NativeTextfieldViews);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_TEXTFIELD_NATIVE_TEXTFIELD_VIEWS_H_