Fix compilation under chromium checkouts.
This is a fix to hide pdfium's safe_conversions.h from the
higher-level callers.
R=thestig@chromium.org
Review URL: https://codereview.chromium.org/1132163002
diff --git a/core/include/fxcrt/fx_system.h b/core/include/fxcrt/fx_system.h
index 9cc165f..37af19c 100644
--- a/core/include/fxcrt/fx_system.h
+++ b/core/include/fxcrt/fx_system.h
@@ -192,16 +192,8 @@
FXSYS_FILE* FXSYS_wfopen(FX_LPCWSTR filename, FX_LPCWSTR mode);
#endif
-#ifdef __cplusplus
-} // extern "C"
-#include "../../../third_party/base/numerics/safe_conversions.h"
-#define FXSYS_strlen(ptr) pdfium::base::checked_cast<FX_STRSIZE>(strlen(ptr))
-#define FXSYS_wcslen(ptr) pdfium::base::checked_cast<FX_STRSIZE>(wcslen(ptr))
-extern "C" {
-#else
#define FXSYS_strlen(ptr) ((FX_STRSIZE)strlen(ptr))
#define FXSYS_wcslen(ptr) ((FX_STRSIZE)wcslen(ptr))
-#endif
#define FXSYS_wcscmp wcscmp
#define FXSYS_wcschr wcschr
