Split up ios/web:test_support.

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

-// Copyright 2015 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_FILE_BASED_RESPONSE_PROVIDER_H_
-#define IOS_WEB_PUBLIC_TEST_RESPONSE_PROVIDERS_FILE_BASED_RESPONSE_PROVIDER_H_
-
-#include <memory>
-
-#include "base/compiler_specific.h"
-#import "ios/web/public/test/response_providers/file_based_response_provider_impl.h"
-#import "ios/web/public/test/response_providers/response_provider.h"
-
-namespace base {
-class FilePath;
-}
-
-namespace web {
-
-// FileBasedResponseProvider tries to resolve URL as if it were a path relative
-// to |path| on the filesystem.
-class FileBasedResponseProvider : public ResponseProvider {
- public:
-  explicit FileBasedResponseProvider(const base::FilePath& path);
-  ~FileBasedResponseProvider() override;
-
-  // web::ReponseProvider implementation.
-  bool CanHandleRequest(const Request& request) override;
-  GCDWebServerResponse* GetGCDWebServerResponse(
-      const Request& request) override;
-
- private:
-  std::unique_ptr<FileBasedResponseProviderImpl> response_provider_impl_;
-};
-}
-
-#endif  // IOS_WEB_PUBLIC_TEST_RESPONSE_PROVIDERS_FILE_BASED_RESPONSE_PROVIDER_H_