Remove IXFA_* interfaces.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index a21c0da26360cca57677ba258301126d77ae0eb4..3d720c46093661df0c1c35e16ec71a3e35bc217d 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -1398,9 +1398,7 @@ if (pdf_enable_xfa) {
       "xfa/fxbarcode/qrcode/BC_QRGridSampler.h",
       "xfa/fxbarcode/utils.h",
       "xfa/fxfa/app/xfa_checksum.cpp",
-      "xfa/fxfa/app/xfa_checksum.h",
       "xfa/fxfa/app/xfa_ffapp.cpp",
-      "xfa/fxfa/app/xfa_ffapp.h",
       "xfa/fxfa/app/xfa_ffbarcode.cpp",
       "xfa/fxfa/app/xfa_ffbarcode.h",
       "xfa/fxfa/app/xfa_ffcheckbutton.cpp",
@@ -1408,11 +1406,8 @@ if (pdf_enable_xfa) {
       "xfa/fxfa/app/xfa_ffchoicelist.cpp",
       "xfa/fxfa/app/xfa_ffchoicelist.h",
       "xfa/fxfa/app/xfa_ffdoc.cpp",
-      "xfa/fxfa/app/xfa_ffdoc.h",
       "xfa/fxfa/app/xfa_ffdochandler.cpp",
-      "xfa/fxfa/app/xfa_ffdochandler.h",
       "xfa/fxfa/app/xfa_ffdocview.cpp",
-      "xfa/fxfa/app/xfa_ffdocview.h",
       "xfa/fxfa/app/xfa_ffdraw.cpp",
       "xfa/fxfa/app/xfa_ffdraw.h",
       "xfa/fxfa/app/xfa_ffexclgroup.cpp",
@@ -1426,7 +1421,6 @@ if (pdf_enable_xfa) {
       "xfa/fxfa/app/xfa_ffnotify.cpp",
       "xfa/fxfa/app/xfa_ffnotify.h",
       "xfa/fxfa/app/xfa_ffpageview.cpp",
-      "xfa/fxfa/app/xfa_ffpageview.h",
       "xfa/fxfa/app/xfa_ffpath.cpp",
       "xfa/fxfa/app/xfa_ffpath.h",
       "xfa/fxfa/app/xfa_ffpushbutton.cpp",
@@ -1444,15 +1438,12 @@ if (pdf_enable_xfa) {
       "xfa/fxfa/app/xfa_ffwidgetacc.cpp",
       "xfa/fxfa/app/xfa_ffwidgetacc.h",
       "xfa/fxfa/app/xfa_ffwidgethandler.cpp",
-      "xfa/fxfa/app/xfa_ffwidgethandler.h",
       "xfa/fxfa/app/xfa_fontmgr.cpp",
-      "xfa/fxfa/app/xfa_fontmgr.h",
       "xfa/fxfa/app/xfa_fwladapter.cpp",
       "xfa/fxfa/app/xfa_fwladapter.h",
       "xfa/fxfa/app/xfa_fwltheme.cpp",
       "xfa/fxfa/app/xfa_fwltheme.h",
       "xfa/fxfa/app/xfa_rendercontext.cpp",
-      "xfa/fxfa/app/xfa_rendercontext.h",
       "xfa/fxfa/app/xfa_textlayout.cpp",
       "xfa/fxfa/app/xfa_textlayout.h",
       "xfa/fxfa/fm2js/xfa_error.cpp",
@@ -1545,6 +1536,15 @@ if (pdf_enable_xfa) {
       "xfa/include/fxfa/fxfa_basic.h",
       "xfa/include/fxfa/fxfa_objectacc.h",
       "xfa/include/fxfa/fxfa_widget.h",
+      "xfa/include/fxfa/xfa_checksum.h",
+      "xfa/include/fxfa/xfa_ffapp.h",
+      "xfa/include/fxfa/xfa_ffdoc.h",
+      "xfa/include/fxfa/xfa_ffdochandler.h",
+      "xfa/include/fxfa/xfa_ffdocview.h",
+      "xfa/include/fxfa/xfa_ffpageview.h",
+      "xfa/include/fxfa/xfa_ffwidgethandler.h",
+      "xfa/include/fxfa/xfa_fontmgr.h",
+      "xfa/include/fxfa/xfa_rendercontext.h",
     ]
     include_dirs = [ "." ]
     if (pdf_enable_v8) {