[net/http auth] Cleanup. Method names, and constness.

net/http/http_auth_handler_factory.cc

Index: net/http/http_auth_handler_factory.cc
diff --git a/net/http/http_auth_handler_factory.cc b/net/http/http_auth_handler_factory.cc
index 5f24fccf3724c8533cf4d3b930dbed4c65c5b169..90b29c7e76cef3cf0bc2d93a4d09629ebd4970fa 100644
--- a/net/http/http_auth_handler_factory.cc
+++ b/net/http/http_auth_handler_factory.cc
@@ -26,8 +26,8 @@ int HttpAuthHandlerFactory::CreateAuthHandlerFromString(
     const BoundNetLog& net_log,
     scoped_ptr<HttpAuthHandler>* handler) {
   HttpAuthChallengeTokenizer props(challenge.begin(), challenge.end());
-  return CreateAuthHandler(&props, target, origin, CREATE_CHALLENGE, 1,
-                           net_log, handler);
+  return CreateAuthHandler(props, target, origin, CREATE_CHALLENGE, 1, net_log,
+                           handler);
 }
 
 int HttpAuthHandlerFactory::CreatePreemptiveAuthHandlerFromString(
@@ -38,7 +38,7 @@ int HttpAuthHandlerFactory::CreatePreemptiveAuthHandlerFromString(
     const BoundNetLog& net_log,
     scoped_ptr<HttpAuthHandler>* handler) {
   HttpAuthChallengeTokenizer props(challenge.begin(), challenge.end());
-  return CreateAuthHandler(&props, target, origin, CREATE_PREEMPTIVE,
+  return CreateAuthHandler(props, target, origin, CREATE_PREEMPTIVE,
                            digest_nonce_count, net_log, handler);
 }
 
@@ -178,14 +178,14 @@ HttpAuthHandlerRegistryFactory* HttpAuthHandlerRegistryFactory::Create(
 }
 
 int HttpAuthHandlerRegistryFactory::CreateAuthHandler(
-    HttpAuthChallengeTokenizer* challenge,
+    const HttpAuthChallengeTokenizer& challenge,
     HttpAuth::Target target,
     const GURL& origin,
     CreateReason reason,
     int digest_nonce_count,
     const BoundNetLog& net_log,
     scoped_ptr<HttpAuthHandler>* handler) {
-  std::string scheme = challenge->NormalizedScheme();
+  std::string scheme = challenge.NormalizedScheme();
   if (scheme.empty()) {
     handler->reset();
     return ERR_INVALID_RESPONSE;