Remove FX_BOOL from xfa.

xfa/fxfa/app/xfa_fwladapter.h

 // 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_FXFA_APP_XFA_FWLADAPTER_H_
 #define XFA_FXFA_APP_XFA_FWLADAPTER_H_
 
 #include "core/fxcrt/fx_coordinates.h"
 #include "core/fxcrt/fx_system.h"
 #include "xfa/fwl/core/fwl_error.h"
 
 class IFWL_Widget;
 
 class CXFA_FWLAdapterWidgetMgr {
  public:
   CXFA_FWLAdapterWidgetMgr();
   ~CXFA_FWLAdapterWidgetMgr();
 
   FWL_Error RepaintWidget(IFWL_Widget* pWidget, const CFX_RectF* pRect);
-  FX_BOOL GetPopupPos(IFWL_Widget* pWidget,
-                      FX_FLOAT fMinHeight,
-                      FX_FLOAT fMaxHeight,
-                      const CFX_RectF& rtAnchor,
-                      CFX_RectF& rtPopup);
+  bool GetPopupPos(IFWL_Widget* pWidget,
+                   FX_FLOAT fMinHeight,
+                   FX_FLOAT fMaxHeight,
+                   const CFX_RectF& rtAnchor,
+                   CFX_RectF& rtPopup);
 };
 
 #endif  // XFA_FXFA_APP_XFA_FWLADAPTER_H_