Split up ios/web:test_support.

ios/web/public/test/response_providers/http_auth_response_provider.h

-// Copyright 2017 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_WEB_PUBLIC_TEST_RESPONSE_PROVIDERS_HTTP_AUTH_RESPONSE_PROVIDER_H_
-#define IOS_WEB_PUBLIC_TEST_RESPONSE_PROVIDERS_HTTP_AUTH_RESPONSE_PROVIDER_H_
-
-#include <string>
-
-#import "ios/web/public/test/response_providers/html_response_provider.h"
-#include "url/gurl.h"
-
-namespace net {
-class HttpResponseHeaders;
-class HttpRequestHeaders;
-}  // namespace net
-
-namespace web {
-
-// Serves a page which requires Basic HTTP Authentication.
-class HttpAuthResponseProvider : public HtmlResponseProvider {
- public:
-  // Constructs provider which will respond to the given |url| and will use the
-  // given authenticaion |realm|. |username| and |password| are credentials
-  // required for sucessfull authentication. Use different realms and
-  // username/password combination for different tests to prevent credentials
-  // caching.
-  HttpAuthResponseProvider(const GURL& url,
-                           const std::string& realm,
-                           const std::string& username,
-                           const std::string& password);
-  ~HttpAuthResponseProvider() override;
-
-  // HtmlResponseProvider overrides:
-  bool CanHandleRequest(const Request& request) override;
-  void GetResponseHeadersAndBody(
-      const Request& request,
-      scoped_refptr<net::HttpResponseHeaders>* headers,
-      std::string* response_body) override;
-
-  // Text returned in response if authentication was successfull.
-  static std::string page_text() { return "authenticated"; }
-
- private:
-  // Checks if authorization header has valid credintials:
-  // https://tools.ietf.org/html/rfc1945#section-10.2
-  bool HeadersHaveValidCredentials(const net::HttpRequestHeaders& headers);
-
-  // URL this provider responds to.
-  GURL url_;
-  // HTTP Authentication realm.
-  std::string realm_;
-  // Correct username to pass authentication
-  std::string username_;
-  // Correct password to pass authentication
-  std::string password_;
-};
-
-}  // namespace web
-
-#endif  // IOS_WEB_PUBLIC_TEST_RESPONSE_PROVIDERS_HTTP_AUTH_RESPONSE_PROVIDER_H_