[net/http auth] Split HttpAuthHandler creation from initialization.

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 59712d843790fcfe04fb54ea316f384a18847b55..4497fb2e2da411e957f90f6b14b7508ffc5b6248 100644
--- a/net/http/http_auth_handler_negotiate.h
+++ b/net/http/http_auth_handler_negotiate.h
@@ -76,13 +76,14 @@ class NET_EXPORT_PRIVATE HttpAuthHandlerNegotiate : public HttpAuthHandler {
       auth_library_.reset(auth_provider);
     }
 
-    int CreateAuthHandler(const HttpAuthChallengeTokenizer& challenge,
-                          HttpAuth::Target target,
-                          const GURL& origin,
-                          CreateReason reason,
-                          int digest_nonce_count,
-                          const BoundNetLog& net_log,
-                          scoped_ptr<HttpAuthHandler>* handler) override;
+    // HttpAuthHandlerFactory
+    scoped_ptr<HttpAuthHandler> CreateAuthHandlerForScheme(
+        const std::string& scheme) override;
+    scoped_ptr<HttpAuthHandler> CreateAndInitPreemptiveAuthHandler(
+        HttpAuthCache::Entry* cache_entry,
+        const HttpAuthChallengeTokenizer& tokenizer,
+        HttpAuth::Target target,
+        const BoundNetLog& net_log) override;
 
    private:
     bool disable_cname_lookup_;