For PR797:

Make the Win32 code exception free (untested/uncompiled) which forced some
interface changes which had ripple effect. This should be the last of 797.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29884 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/System/MappedFile.h

@@ -134,7 +134,7 @@ namespace sys {
     /// areas of memory after this call.
     /// @throws std::string if an error occurs
     /// @brief Set the size of the file and memory mapping.
-    void size(size_t new_size);
+    bool size(size_t new_size, std::string* ErrMsg = 0);
 
     void close() { if (info_) terminate(); }