Remove warning pragmas in pe_image.cc

base/win/pe_image.h

Index: base/win/pe_image.h
diff --git a/base/win/pe_image.h b/base/win/pe_image.h
index ba21d85d5d42df681f2bb97fca36a0837b19b0a5..4c36bcf850e61f578436eb6b65754eeeb4058ae9 100644
--- a/base/win/pe_image.h
+++ b/base/win/pe_image.h
@@ -146,7 +146,7 @@ class PEImage {
   // Pre: 'f' is either a zero terminated string or ordinal.
   // Post: if 'f' is a non-forwarded export from image, 'p' is
   //       the exported function. If 'f' is a forwarded export
-  //       then p is the special value 0xFFFFFFFF. In this case
+  //       then p is the special value -1. In this case
   //       RVAToAddr(*GetExportEntry) can be used to resolve
   //       the string that describes the forward.
   FARPROC GetProcAddress(LPCSTR function_name) const;