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

net/http/http_auth_handler_negotiate.h

Index: net/http/http_auth_handler_negotiate.h
diff --git a/net/http/http_auth_handler_negotiate.h b/net/http/http_auth_handler_negotiate.h
index 92b1b52160599a58f21752f2d7d3a8bbf254b6c4..59712d843790fcfe04fb54ea316f384a18847b55 100644
--- a/net/http/http_auth_handler_negotiate.h
+++ b/net/http/http_auth_handler_negotiate.h
@@ -76,7 +76,7 @@ class NET_EXPORT_PRIVATE HttpAuthHandlerNegotiate : public HttpAuthHandler {
       auth_library_.reset(auth_provider);
     }
 
-    int CreateAuthHandler(HttpAuthChallengeTokenizer* challenge,
+    int CreateAuthHandler(const HttpAuthChallengeTokenizer& challenge,
                           HttpAuth::Target target,
                           const GURL& origin,
                           CreateReason reason,
@@ -112,16 +112,16 @@ class NET_EXPORT_PRIVATE HttpAuthHandlerNegotiate : public HttpAuthHandler {
 
   // HttpAuthHandler:
   HttpAuth::AuthorizationResult HandleAnotherChallenge(
-      HttpAuthChallengeTokenizer* challenge) override;
+      const HttpAuthChallengeTokenizer& challenge) override;
   bool NeedsIdentity() override;
   bool AllowsDefaultCredentials() override;
   bool AllowsExplicitCredentials() override;
 
  protected:
-  bool Init(HttpAuthChallengeTokenizer* challenge) override;
+  int Init(const HttpAuthChallengeTokenizer& challenge) override;
 
   int GenerateAuthTokenImpl(const AuthCredentials* credentials,
-                            const HttpRequestInfo* request,
+                            const HttpRequestInfo& request,
                             const CompletionCallback& callback,
                             std::string* auth_token) override;