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

chrome/browser/chromeos/login/saml/saml_browsertest.cc

Index: chrome/browser/chromeos/login/saml/saml_browsertest.cc
diff --git a/chrome/browser/chromeos/login/saml/saml_browsertest.cc b/chrome/browser/chromeos/login/saml/saml_browsertest.cc
index 82b334db0af6424799c33880aef0f7842ba7e3dd..a5ddc56a63ad6e8943f1a383d061af8c29dab0fe 100644
--- a/chrome/browser/chromeos/login/saml/saml_browsertest.cc
+++ b/chrome/browser/chromeos/login/saml/saml_browsertest.cc
@@ -216,7 +216,7 @@ std::unique_ptr<HttpResponse> FakeSamlIdp::HandleRequest(
   // The scheme and host of the URL is actually not important but required to
   // get a valid GURL in order to parse |request.relative_url|.
   GURL request_url = GURL("http://localhost").Resolve(request.relative_url);
-  std::string request_path = request_url.path();
+  base::StringPiece request_path = request_url.path();
 
   if (request_path == login_path_) {
     std::string relay_state;
@@ -323,7 +323,7 @@ class SamlTest : public OobeBaseTest {
 
     const GURL gaia_url = gaia_https_forwarder_.GetURLForSSLHost("");
     const GURL saml_idp_url = saml_https_forwarder_.GetURLForSSLHost("SAML");
-    fake_saml_idp_.SetUp(saml_idp_url.path(), gaia_url);
+    fake_saml_idp_.SetUp(saml_idp_url.path().as_string(), gaia_url);
     fake_gaia_->RegisterSamlUser(kFirstSAMLUserEmail, saml_idp_url);
     fake_gaia_->RegisterSamlUser(kSecondSAMLUserEmail, saml_idp_url);
     fake_gaia_->RegisterSamlUser(