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

chrome/utility/media_galleries/itunes_library_parser.cc

Index: chrome/utility/media_galleries/itunes_library_parser.cc
diff --git a/chrome/utility/media_galleries/itunes_library_parser.cc b/chrome/utility/media_galleries/itunes_library_parser.cc
index 6eaa60fd8aca29ce741359cbcca0aae6a64b367c..954f6378585bda1230fbab079916d7d559f4cf3e 100644
--- a/chrome/utility/media_galleries/itunes_library_parser.cc
+++ b/chrome/utility/media_galleries/itunes_library_parser.cc
@@ -51,9 +51,9 @@ class TrackInfoXmlDictReader : public iapps::XmlDictReader {
       if (!url.SchemeIsFile())
         return false;
       url::RawCanonOutputW<1024> decoded_location;
-      url::DecodeURLEscapeSequences(url.path().c_str() + 1,  // Strip /.
-                                    url.path().length() - 1,
-                                    &decoded_location);
+      url::DecodeURLEscapeSequences(
+          url.path().as_string().c_str() + 1,  // Strip /.
+          url.path().as_string().length() - 1, &decoded_location);
 #if defined(OS_WIN)
       base::string16 location(decoded_location.data(),
                               decoded_location.length());