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

net/base/sdch_dictionary_unittest.cc

Index: net/base/sdch_dictionary_unittest.cc
diff --git a/net/base/sdch_dictionary_unittest.cc b/net/base/sdch_dictionary_unittest.cc
index d9fd92e7db41ba8e77791f8ed1287607cd219702..5a413e82bc32cca2edd0ddb153e7e9e1f2d8c554 100644
--- a/net/base/sdch_dictionary_unittest.cc
+++ b/net/base/sdch_dictionary_unittest.cc
@@ -77,7 +77,8 @@ TEST(SdchDictionaryTest, CanUse) {
 }
 
 TEST(SdchDictionaryTest, PathMatch) {
-  bool (*PathMatch)(const std::string& path, const std::string& restriction) =
+  bool (*PathMatch)(const base::StringPiece& path,
+                    const base::StringPiece& restriction) =
       SdchDictionary::PathMatch;
   // Perfect match is supported.
   EXPECT_TRUE(PathMatch("/search", "/search"));