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

chrome/browser/password_manager/password_store_mac.cc

Index: chrome/browser/password_manager/password_store_mac.cc
diff --git a/chrome/browser/password_manager/password_store_mac.cc b/chrome/browser/password_manager/password_store_mac.cc
index ae3f6db91e43e92a116ca2f6d431829a68ff23e2..22f2be4d51fd2552c4d920bb93b6cffd1a92b46f 100644
--- a/chrome/browser/password_manager/password_store_mac.cc
+++ b/chrome/browser/password_manager/password_store_mac.cc
@@ -664,7 +664,7 @@ bool ExtractSignonRealmComponents(const std::string& signon_realm,
   if (security_domain) {
     // Strip the leading '/' off of the path to get the security domain.
     if (realm_as_url.path().length() > 0)
-      *security_domain = realm_as_url.path().substr(1);
+      *security_domain = realm_as_url.path().substr(1).as_string();
     else
       security_domain->clear();
   }
@@ -794,7 +794,7 @@ bool MacKeychainPasswordFormAdapter::AddPassword(const PasswordForm& form) {
   std::string path;
   // Path doesn't make sense for Android app credentials.
   if (!password_manager::IsValidAndroidFacetURI(form.signon_realm))
-    path = form.origin.path();
+    path = form.origin.path().as_string();
   std::string username = base::UTF16ToUTF8(form.username_value);
   std::string password = base::UTF16ToUTF8(form.password_value);
   SecProtocolType protocol = is_secure ? kSecProtocolTypeHTTPS
@@ -867,7 +867,7 @@ SecKeychainItemRef MacKeychainPasswordFormAdapter::KeychainItemForForm(
   std::string path;
   // Path doesn't make sense for Android app credentials.
   if (!password_manager::IsValidAndroidFacetURI(form.signon_realm))
-    path = form.origin.path();
+    path = form.origin.path().as_string();
   std::string username = base::UTF16ToUTF8(form.username_value);
   std::vector<SecKeychainItemRef> matches = MatchingKeychainItems(
       form.signon_realm, form.scheme, path.c_str(), username.c_str());