ui: Cleanup class/struct forward declarations

ui/views/controls/textfield/textfield.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_H_
 #define UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 19 matching lines @@
 #include "ui/views/controls/textfield/textfield_model.h"
 #include "ui/views/drag_controller.h"
 #include "ui/views/selection_controller.h"
 #include "ui/views/selection_controller_delegate.h"
 #include "ui/views/view.h"
 #include "ui/views/word_lookup_client.h"
 
 namespace views {
 
 class MenuRunner;
-class Painter;
 class TextfieldController;
 
 // A views/skia textfield implementation. No platform-specific code is used.
 class VIEWS_EXPORT Textfield : public View,
                                public TextfieldModel::Delegate,
                                public ContextMenuController,
                                public DragController,
                                public WordLookupClient,
                                public SelectionControllerDelegate,
                                public ui::TouchEditable,
@@ skipping 479 matching lines @@
 
   // Used to bind callback functions to this object.
   base::WeakPtrFactory<Textfield> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(Textfield);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_TEXTFIELD_TEXTFIELD_H_