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

net/test/embedded_test_server/http_request.cc

Index: net/test/embedded_test_server/http_request.cc
diff --git a/net/test/embedded_test_server/http_request.cc b/net/test/embedded_test_server/http_request.cc
index 2c247c614a9ddbf09123416b94e2b47ee92d4185..66ebd2c1f959f96aebf925895c3af4a96ab67212 100644
--- a/net/test/embedded_test_server/http_request.cc
+++ b/net/test/embedded_test_server/http_request.cc
@@ -109,7 +109,7 @@ HttpRequestParser::ParseResult HttpRequestParser::ParseHeaders() {
     // know) anything about the server address.
     GURL url(header_line_tokens[1]);
     if (url.is_valid()) {
-      http_request_->relative_url = url.path();
+      http_request_->relative_url = url.path().as_string();
     } else if (header_line_tokens[1][0] == '/') {
       http_request_->relative_url = header_line_tokens[1];
     } else {