Adding a HexEncode function to string_utils....

base/string_util.h

Index: base/string_util.h
===================================================================
--- base/string_util.h	(revision 8370)
+++ base/string_util.h	(working copy)
@@ -528,5 +528,13 @@
 bool MatchPattern(const std::wstring& string, const std::wstring& pattern);
 bool MatchPattern(const std::string& string, const std::string& pattern);
 
+// Returns a hex string representation of a binary buffer.
+// The returned hex string will be in upper case.
+// This function does not check if |size| is within reasonable limits since
+// it's written with trusted data in mind.
+// If you suspect that the data you want to format might be large,
+// the absolute max size for |size| should be is
+//   std::numeric_limits<size_t>::max() / 2
+std::string HexEncode(const void* bytes, size_t size);
+
 #endif  // BASE_STRING_UTIL_H_
-