Make (and verify) public/ files compile under C.

This involves adding some missing extern "C" { } declarations,
using FPDF_ types instead of C++ types, and converting pass
by reference arguments into pointers.

Test this using fpdfview_embedertest for simplicity.

BUG=pdfium:158
R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1130843003

1 files changed, 1 insertions, 1 deletions

diff --git a/testing/embedder_test.cpp b/testing/embedder_test.cpp
index e1473c0473..4cf7a8db8a 100644
--- a/testing/embedder_test.cpp
+++ b/testing/embedder_test.cpp
@@ -166,7 +166,7 @@ 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;
 }