Move xfa_basic_imp to cxfa_widetextread.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 5426860f90fc5a96be9c1370baeb5f6bfd976285..caa727a19e72026df2ec9fdcaf039d31138fe977 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1383,6 +1383,8 @@ if (pdf_enable_xfa) {
       "xfa/fxfa/parser/cxfa_line.h",
       "xfa/fxfa/parser/cxfa_margin.cpp",
       "xfa/fxfa/parser/cxfa_margin.h",
+      "xfa/fxfa/parser/cxfa_measurement.cpp",
+      "xfa/fxfa/parser/cxfa_measurement.h",
       "xfa/fxfa/parser/cxfa_node.cpp",
       "xfa/fxfa/parser/cxfa_nodehelper.cpp",
       "xfa/fxfa/parser/cxfa_nodehelper.h",
@@ -1416,6 +1418,8 @@ if (pdf_enable_xfa) {
       "xfa/fxfa/parser/cxfa_value.h",
       "xfa/fxfa/parser/cxfa_valuearray.cpp",
       "xfa/fxfa/parser/cxfa_valuearray.h",
+      "xfa/fxfa/parser/cxfa_widetextread.cpp",
+      "xfa/fxfa/parser/cxfa_widetextread.h",
       "xfa/fxfa/parser/cxfa_widgetdata.cpp",
       "xfa/fxfa/parser/cxfa_widgetdata.h",
       "xfa/fxfa/parser/cxfa_xml_parser.cpp",
@@ -1428,8 +1432,6 @@ if (pdf_enable_xfa) {
       "xfa/fxfa/parser/xfa_basic_data_element_script.cpp",
       "xfa/fxfa/parser/xfa_basic_data_enum.cpp",
       "xfa/fxfa/parser/xfa_basic_data_packets.cpp",
-      "xfa/fxfa/parser/xfa_basic_imp.cpp",
-      "xfa/fxfa/parser/xfa_basic_imp.h",
       "xfa/fxfa/parser/xfa_doclayout.h",
       "xfa/fxfa/parser/xfa_document.h",
       "xfa/fxfa/parser/xfa_document_datamerger_imp.cpp",