Merge the CFWL_*Imp classes into the IFWL_* classes.

xfa/fwl/basewidget/ifwl_caret.h

Index: xfa/fwl/basewidget/ifwl_caret.h
diff --git a/xfa/fwl/basewidget/ifwl_caret.h b/xfa/fwl/basewidget/ifwl_caret.h
deleted file mode 100644
index 53166c2aa6084f6ca3b8ad82ff4aa15f2ffa54d3..0000000000000000000000000000000000000000
--- a/xfa/fwl/basewidget/ifwl_caret.h
+++ /dev/null
@@ -1,30 +0,0 @@
-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#ifndef XFA_FWL_BASEWIDGET_IFWL_CARET_H_
-#define XFA_FWL_BASEWIDGET_IFWL_CARET_H_
-
-#include "xfa/fwl/core/cfwl_widgetimpproperties.h"
-#include "xfa/fwl/core/ifwl_widget.h"
-
-#define FWL_CLASS_Caret L"FWL_CARET"
-#define FWL_STATE_CAT_HightLight 1
-
-class IFWL_Caret : public IFWL_Widget {
- public:
-  static IFWL_Caret* Create(const CFWL_WidgetImpProperties& properties,
-                            IFWL_Widget* pOuter);
-
-  void ShowCaret(FX_BOOL bFlag = TRUE);
-  FWL_Error GetFrequency(uint32_t& elapse);
-  FWL_Error SetFrequency(uint32_t elapse);
-  FWL_Error SetColor(CFX_Color crFill);
-
- protected:
-  IFWL_Caret();
-};
-
-#endif  // XFA_FWL_BASEWIDGET_IFWL_CARET_H_