XFA: Manual merge of Clean up IFX_BidiChar

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index d1353c477d4d6b87d5bab452201a3ec41b3ac9b6..3fcdc2b1bf8d615166defa73b31a2372d96bc217 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -469,6 +469,7 @@ static_library("fxcrt") {
   sources = [
     "core/include/fxcrt/fx_arb.h",
     "core/include/fxcrt/fx_basic.h",
+    "core/include/fxcrt/fx_bidi.h",
     "core/include/fxcrt/fx_coordinates.h",
     "core/include/fxcrt/fx_ext.h",
     "core/include/fxcrt/fx_memory.h",
@@ -493,6 +494,7 @@ static_library("fxcrt") {
     "core/src/fxcrt/fx_basic_utf.cpp",
     "core/src/fxcrt/fx_basic_util.cpp",
     "core/src/fxcrt/fx_basic_wstring.cpp",
+    "core/src/fxcrt/fx_bidi.cpp",
     "core/src/fxcrt/fx_extension.cpp",
     "core/src/fxcrt/fx_ucddata.cpp",
     "core/src/fxcrt/fx_unicode.cpp",