Removing GetWebViewFactory method in WebClient.

ios/web/public/test/test_web_client.h

 // Copyright 2014 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 WEB_TEST_WEB_PUBLIC_TEST_TEST_WEB_CLIENT_H_
 #define WEB_TEST_WEB_PUBLIC_TEST_TEST_WEB_CLIENT_H_
 
 #import <Foundation/Foundation.h>
 
 #include "base/compiler_specific.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #include "ios/web/public/web_client.h"
 
 namespace web {
 
-class WebViewFactory;
-
 // A WebClient used for testing purposes.
 class TestWebClient : public web::WebClient {
  public:
   TestWebClient();
   ~TestWebClient() override;
   // WebClient implementation.
   std::string GetUserAgent(bool is_desktop_user_agent) const override;
   NSString* GetEarlyPageScript(web::WebViewType web_view_type) const override;
 
   // Changes the user agent for testing purposes. Passing true
   // for |is_desktop_user_agent| affects the result of GetUserAgent(true) call.
   // Passing false affects the result of GetUserAgent(false).
   void SetUserAgent(const std::string& user_agent, bool is_desktop_user_agent);
 
   // Changes Early Page Script for testing purposes.
   void SetEarlyPageScript(NSString* page_script,
                           web::WebViewType web_view_type);
 
  private:
   std::string user_agent_;
   std::string desktop_user_agent_;
   base::scoped_nsobject<NSMutableDictionary> early_page_scripts_;
 };
 
 }  // namespace web
 
 #endif // WEB_TEST_WEB_PUBLIC_TEST_TEST_WEB_CLIENT_H_