Merge to XFA: Make (and verify) public/ files compile under C.

testing/embedder_test.cpp

Index: testing/embedder_test.cpp
diff --git a/testing/embedder_test.cpp b/testing/embedder_test.cpp
index e1618677322ce0f07868edef0083b8e3687462d7..1c3c2feb644036c5d5e49a4ac31c1216f03a9286 100644
--- a/testing/embedder_test.cpp
+++ b/testing/embedder_test.cpp
@@ -167,7 +167,7 @@ int Get_Block(void* param, unsigned long pos, unsigned char* pBuf,
   return 1;
 }
 
-bool Is_Data_Avail(FX_FILEAVAIL* pThis, size_t offset, size_t size) {
+FPDF_BOOL Is_Data_Avail(FX_FILEAVAIL* pThis, size_t offset, size_t size) {
   return true;
 }
 
@@ -262,7 +262,7 @@ bool EmbedderTest::OpenDocument(const std::string& filename) {
     return false;
   }
   int docType = DOCTYPE_PDF;
-  if (FPDF_HasXFAField(document_, docType))
+  if (FPDF_HasXFAField(document_, &docType))
   {
     if (docType != DOCTYPE_PDF)
       (void) FPDF_LoadXFA(document_);