[WIP] make GURL::path() return a StringPiece

net/base/sdch_dictionary.h

Index: net/base/sdch_dictionary.h
diff --git a/net/base/sdch_dictionary.h b/net/base/sdch_dictionary.h
index c2fb7c87bf999324311166c55204775a5960f74f..03854d71da2e4e7bf3fee6ed33762b999a8aa3cd 100644
--- a/net/base/sdch_dictionary.h
+++ b/net/base/sdch_dictionary.h
@@ -67,8 +67,8 @@ class NET_EXPORT_PRIVATE SdchDictionary {
   SdchProblemCode CanUse(const GURL& referring_url) const;
 
   // Compare paths to see if they "match" for dictionary use.
-  static bool PathMatch(const std::string& path,
-                        const std::string& restriction);
+  static bool PathMatch(const base::StringPiece& path,
+                        const base::StringPiece& restriction);
 
   // Is this dictionary expired?
   bool Expired() const;