Revert "Remove more ifndef XFA cases"

This reverts commit 38cb7263a0923dd5613da24b18d3d7ef052ff5e3.

Reason for revert: Blocking prior revert.

Original change's description:
> Remove more ifndef XFA cases
> 
> Remove FXFT_Clear_Face_External_Stream() calls, period. This would cause
> FT to try to free memory allocated by the caller, with potentially a
> different allocator. If we're leaking, msan will find it, and we can
> deal with it properly rather than trying to force FT to tidy after us.
> 
> Always call SetView(), if we have a PDF page.  At worst, the link won't
> be used in the XFA case.
> 
> Always return 0 for the null document permissions.  If we don't have a
> document, then we can't dynamically tell if its an XFA doc, so there's
> no reason to believe it should have all permissions.  If there is an
> XFA doc under the covers, then the extension will give us the value.
> 
> 
> Change-Id: I6e3fb589eda722786567d96288cb35f43643437b
> Reviewed-on: https://pdfium-review.googlesource.com/33370
> Commit-Queue: Tom Sepez <tsepez@chromium.org>
> Reviewed-by: Lei Zhang <thestig@chromium.org>

TBR=thestig@chromium.org,tsepez@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I68b6a50ef28fb3d6ab9d8494c4486ca9fb66589e
Reviewed-on: https://pdfium-review.googlesource.com/33734
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

1 files changed, 10 insertions, 1 deletions

diff --git a/fpdfsdk/fpdf_view.cpp b/fpdfsdk/fpdf_view.cpp
index f5a164a75f..f0ceb1f378 100644
--- a/fpdfsdk/fpdf_view.cpp
+++ b/fpdfsdk/fpdf_view.cpp
@@ -308,7 +308,16 @@ FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_GetFileVersion(FPDF_DOCUMENT doc,
 FPDF_EXPORT unsigned long FPDF_CALLCONV
 FPDF_GetDocPermissions(FPDF_DOCUMENT document) {
   CPDF_Document* pDoc = CPDFDocumentFromFPDFDocument(document);
-  return pDoc ? pDoc->GetUserPermissions() : 0;
+  // https://bugs.chromium.org/p/pdfium/issues/detail?id=499
+  if (!pDoc) {
+#ifndef PDF_ENABLE_XFA
+    return 0;
+#else   // PDF_ENABLE_XFA
+    return 0xFFFFFFFF;
+#endif  // PDF_ENABLE_XFA
+  }
+
+  return pDoc->GetUserPermissions();
 }
 
 FPDF_EXPORT int FPDF_CALLCONV