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

net/http/http_auth_handler_basic.h

Index: net/http/http_auth_handler_basic.h
diff --git a/net/http/http_auth_handler_basic.h b/net/http/http_auth_handler_basic.h
index 4f369cc3ddb7f23e629b9ee6cdf280b64927350a..af59584310e368478000576098c2d7b0fc2afef8 100644
--- a/net/http/http_auth_handler_basic.h
+++ b/net/http/http_auth_handler_basic.h
@@ -21,29 +21,32 @@ class NET_EXPORT_PRIVATE HttpAuthHandlerBasic : public HttpAuthHandler {
     Factory();
     ~Factory() override;
 
-    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;
   };
 
+  ~HttpAuthHandlerBasic() override {}
+
+  // HttpAuthHandler
   HttpAuth::AuthorizationResult HandleAnotherChallenge(
       const HttpAuthChallengeTokenizer& challenge) override;
 
  protected:
+  // HttpAuthHandler
   int Init(const HttpAuthChallengeTokenizer& challenge) override;
-
   int GenerateAuthTokenImpl(const AuthCredentials* credentials,
                             const HttpRequestInfo& request,
                             const CompletionCallback& callback,
                             std::string* auth_token) override;
 
  private:
-  ~HttpAuthHandlerBasic() override {}
-
+  HttpAuthHandlerBasic();
   int ParseChallenge(const HttpAuthChallengeTokenizer& challenge);
 };