Remove FX_BOOL from core

core/fpdfdoc/cpdf_viewerpreferences.cpp

Index: core/fpdfdoc/cpdf_viewerpreferences.cpp
diff --git a/core/fpdfdoc/cpdf_viewerpreferences.cpp b/core/fpdfdoc/cpdf_viewerpreferences.cpp
index fb005bef86f6f12192113668f803083035806924..799f2d58144d1ffc6e23842233f64b52f01d60aa 100644
--- a/core/fpdfdoc/cpdf_viewerpreferences.cpp
+++ b/core/fpdfdoc/cpdf_viewerpreferences.cpp
@@ -13,14 +13,14 @@ CPDF_ViewerPreferences::CPDF_ViewerPreferences(CPDF_Document* pDoc)
 
 CPDF_ViewerPreferences::~CPDF_ViewerPreferences() {}
 
-FX_BOOL CPDF_ViewerPreferences::IsDirectionR2L() const {
+bool CPDF_ViewerPreferences::IsDirectionR2L() const {
   CPDF_Dictionary* pDict = GetViewerPreferences();
-  return pDict ? pDict->GetStringFor("Direction") == "R2L" : FALSE;
+  return pDict ? pDict->GetStringFor("Direction") == "R2L" : false;
 }
 
-FX_BOOL CPDF_ViewerPreferences::PrintScaling() const {
+bool CPDF_ViewerPreferences::PrintScaling() const {
   CPDF_Dictionary* pDict = GetViewerPreferences();
-  return pDict ? pDict->GetStringFor("PrintScaling") != "None" : TRUE;
+  return pDict ? pDict->GetStringFor("PrintScaling") != "None" : true;
 }
 
 int32_t CPDF_ViewerPreferences::NumCopies() const {