Cleanup IFX_BidiChar

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 3cc46180a6a5f0d96078179cf261a06f795d0fd0..d3c092e4687701985d2ec02729d05c23c9d35b5a 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -396,8 +396,8 @@ static_library("fxcodec") {
 
 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",
@@ -408,8 +408,6 @@ static_library("fxcrt") {
     "core/include/fxcrt/fx_ucd.h",
     "core/include/fxcrt/fx_xml.h",
     "core/src/fxcrt/extension.h",
-    "core/src/fxcrt/fx_arabic.cpp",
-    "core/src/fxcrt/fx_arabic.h",
     "core/src/fxcrt/fx_basic_array.cpp",
     "core/src/fxcrt/fx_basic_bstring.cpp",
     "core/src/fxcrt/fx_basic_buffer.cpp",
@@ -422,6 +420,7 @@ 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",
@@ -739,6 +738,7 @@ test("pdfium_unittests") {
     "core/src/fxcrt/fx_basic_bstring_unittest.cpp",
     "core/src/fxcrt/fx_basic_memmgr_unittest.cpp",
     "core/src/fxcrt/fx_basic_wstring_unittest.cpp",
+    "core/src/fxcrt/fx_bidi_unittest.cpp",
     "core/src/fxcrt/fx_system_unittest.cpp",
     "testing/fx_string_testhelpers.cpp",
     "testing/fx_string_testhelpers.h",