Fix include order for cpdfxfa_context.h

It should include cpdfsdk_helpers, not the other way around.

Change-Id: Id2cc3018e8c38f82ce8a35b03bb90e936aa1d446
Reviewed-on: https://pdfium-review.googlesource.com/31294
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
diff --git a/fpdfsdk/cpdfsdk_formfillenvironment.cpp b/fpdfsdk/cpdfsdk_formfillenvironment.cpp
index 272e270..a115355 100644
--- a/fpdfsdk/cpdfsdk_formfillenvironment.cpp
+++ b/fpdfsdk/cpdfsdk_formfillenvironment.cpp
@@ -20,6 +20,10 @@
 #include "fxjs/ijs_runtime.h"
 #include "third_party/base/ptr_util.h"
 
+#ifdef PDF_ENABLE_XFA
+#include "fpdfsdk/fpdfxfa/cpdfxfa_context.h"
+#endif
+
 FPDF_WIDESTRING AsFPDFWideString(ByteString* bsUTF16LE) {
   // Force a private version of the string, since we're about to hand it off
   // to the embedder. Should the embedder modify it by accident, it won't
@@ -704,6 +708,16 @@
   return !m_pFocusAnnot;
 }
 
+#ifdef PDF_ENABLE_XFA
+CPDF_Document* CPDFSDK_FormFillEnvironment::GetPDFDocument() const {
+  return m_pUnderlyingDoc ? m_pUnderlyingDoc->GetPDFDoc() : nullptr;
+}
+#endif  // PDF_ENABLE_XFA
+
+int CPDFSDK_FormFillEnvironment::GetPageCount() const {
+  return m_pUnderlyingDoc->GetPageCount();
+}
+
 bool CPDFSDK_FormFillEnvironment::GetPermissions(int nFlag) const {
   return !!(GetPDFDocument()->GetUserPermissions() & nFlag);
 }