Merge to XFA: Remove header files that only have includes.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 5fa43eb8e3d102e0c81035aa4eb6ba229dfe73e2..47dc81e469430e8a2b470a92d183fc70d6913df8 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -245,7 +245,6 @@ static_library("fpdfapi") {
     "core/include/fpdfapi/fpdf_render.h",
     "core/include/fpdfapi/fpdf_resource.h",
     "core/include/fpdfapi/fpdf_serial.h",
-    "core/include/fpdfapi/fpdfapi.h",
     "core/src/fpdfapi/fpdf_basic_module.cpp",
     "core/src/fpdfapi/fpdf_cmaps/CNS1/Adobe-CNS1-UCS2_5.cpp",
     "core/src/fpdfapi/fpdf_cmaps/CNS1/B5pc-H_0.cpp",
@@ -620,7 +619,6 @@ static_library("fxedit") {
     "fpdfsdk/include/fxedit/fx_edit.h",
     "fpdfsdk/include/fxedit/fxet_edit.h",
     "fpdfsdk/include/fxedit/fxet_list.h",
-    "fpdfsdk/include/fxedit/fxet_stub.h",
     "fpdfsdk/src/fxedit/fxet_ap.cpp",
     "fpdfsdk/src/fxedit/fxet_edit.cpp",
     "fpdfsdk/src/fxedit/fxet_list.cpp",
@@ -632,8 +630,6 @@ static_library("fxedit") {
 
 static_library("pdfwindow") {
   sources = [
-    "fpdfsdk/include/pdfwindow/IPDFWindow.h",
-    "fpdfsdk/include/pdfwindow/PDFWindow.h",
     "fpdfsdk/include/pdfwindow/PWL_Button.h",
     "fpdfsdk/include/pdfwindow/PWL_Caret.h",
     "fpdfsdk/include/pdfwindow/PWL_ComboBox.h",
@@ -745,7 +741,6 @@ static_library("formfiller") {
     "fpdfsdk/include/formfiller/FFL_PushButton.h",
     "fpdfsdk/include/formfiller/FFL_RadioButton.h",
     "fpdfsdk/include/formfiller/FFL_TextField.h",
-    "fpdfsdk/include/formfiller/FormFiller.h",
     "fpdfsdk/src/formfiller/FFL_CBA_Fontmap.cpp",
     "fpdfsdk/src/formfiller/FFL_CheckBox.cpp",
     "fpdfsdk/src/formfiller/FFL_ComboBox.cpp",