Implemented VLOG() et al.

base/string_util.h

Index: base/string_util.h
diff --git a/base/string_util.h b/base/string_util.h
index 0b57b78858bb7496bf12aec4a351d62c6db4db09..7079127dfeabce4a9aa6fcaef5491e4ad718254b 100644
--- a/base/string_util.h
+++ b/base/string_util.h
@@ -558,7 +558,8 @@ bool ElideString(const std::wstring& input, int max_len, std::wstring* output);
 // string can contain wildcards like * and ?
 // The backslash character (\) is an escape character for * and ?
 // We limit the patterns to having a max of 16 * or ? characters.
-bool MatchPattern(const std::string& string, const std::string& pattern);
+bool MatchPattern(const base::StringPiece& string,
+                  const base::StringPiece& pattern);
 bool MatchPattern(const string16& string, const string16& pattern);
 
 // Hack to convert any char-like type to its unsigned counterpart.