Rename fxjse/ to fxjs/ update files to match class names.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 303829ec879a96a85ced99e3d22f6323cf32e967..98df2e39c7c6c125d69f8c3cc51240e742b5f10c 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -887,18 +887,19 @@ if (pdf_enable_xfa) {
 
   static_library("xfa") {
     sources = [
-      "fxjse/class.cpp",
-      "fxjse/context.cpp",
-      "fxjse/context.h",
-      "fxjse/dynprop.cpp",
-      "fxjse/include/cfxjse_arguments.h",
-      "fxjse/include/cfxjse_class.h",
-      "fxjse/include/cfxjse_value.h",
-      "fxjse/include/fxjse.h",
-      "fxjse/runtime.cpp",
-      "fxjse/runtime.h",
-      "fxjse/scope_inline.h",
-      "fxjse/value.cpp",
+      "fxjs/cfxjse_arguments.cpp",
+      "fxjs/cfxjse_class.cpp",
+      "fxjs/cfxjse_context.cpp",
+      "fxjs/cfxjse_isolatetracker.cpp",
+      "fxjs/cfxjse_isolatetracker.h",
+      "fxjs/cfxjse_runtimedata.cpp",
+      "fxjs/cfxjse_runtimedata.h",
+      "fxjs/cfxjse_value.cpp",
+      "fxjs/include/cfxjse_arguments.h",
+      "fxjs/include/cfxjse_class.h",
+      "fxjs/include/cfxjse_context.h",
+      "fxjs/include/cfxjse_value.h",
+      "fxjs/include/fxjse.h",
       "xfa/fde/cfde_path.cpp",
       "xfa/fde/cfde_path.h",
       "xfa/fde/cfde_txtedtbuf.cpp",