Remove FX_BOOL from xfa.

xfa/fxgraphics/cfx_path.cpp

 // Copyright 2016 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
 
 #include "xfa/fxgraphics/cfx_path.h"
 
 #include "core/fxge/cfx_pathdata.h"
 #include "xfa/fxgraphics/cfx_path_generator.h"
@@ skipping 144 matching lines @@
   return FWL_Error::Succeeded;
 }
 
 FWL_Error CFX_Path::Clear() {
   if (!m_generator)
     return FWL_Error::PropertyInvalid;
   m_generator->GetPathData()->SetPointCount(0);
   return FWL_Error::Succeeded;
 }
 
-FX_BOOL CFX_Path::IsEmpty() const {
+bool CFX_Path::IsEmpty() const {
   if (!m_generator)
-    return FALSE;
+    return false;
   if (m_generator->GetPathData()->GetPointCount() == 0)
-    return TRUE;
-  return FALSE;
+    return true;
+  return false;
 }
 
 CFX_PathData* CFX_Path::GetPathData() const {
   if (!m_generator)
     return nullptr;
   return m_generator->GetPathData();
 }