Remove FX_BOOL from core

core/fpdftext/cpdf_linkextract.cpp

Index: core/fpdftext/cpdf_linkextract.cpp
diff --git a/core/fpdftext/cpdf_linkextract.cpp b/core/fpdftext/cpdf_linkextract.cpp
index 8546a8294c41dcae5250c329e2c3af955e59b039..a1fc93e158cba8b0e6d234fceaa1951ddc94336c 100644
--- a/core/fpdftext/cpdf_linkextract.cpp
+++ b/core/fpdftext/cpdf_linkextract.cpp
@@ -108,7 +108,7 @@ bool CPDF_LinkExtract::CheckMailLink(CFX_WideString& str) {
     if (ch != L'.' || i == pPos - 1 || i == 0) {
       if (i == aPos - 1) {
         // There is '.' or invalid char before '@'.
-        return FALSE;
+        return false;
       }
       // End extracting for other invalid chars, '.' at the beginning, or
       // consecutive '.'.