Split up ios/web:test_support.

ios/web/public/test/response_providers/file_based_response_provider_impl.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_IMPL_H_
-#define IOS_WEB_PUBLIC_TEST_RESPONSE_PROVIDERS_FILE_BASED_RESPONSE_PROVIDER_IMPL_H_
-
-#include "base/files/file_path.h"
-#import "ios/web/public/test/response_providers/response_provider.h"
-
-class GURL;
-
-namespace web {
-
-// FileBasedMockResponseProvider tries to resolve URL as if it were a path
-// relative to |path| on the filesystem. Use |BuildTargetPath| to resolve URLs
-// to paths on the filesystem.
-class FileBasedResponseProviderImpl {
- public:
-  explicit FileBasedResponseProviderImpl(const base::FilePath& path);
-  virtual ~FileBasedResponseProviderImpl();
-
-  // Returns true if the request's URL when converted to a path on the app
-  // bundle has a file present.
-  bool CanHandleRequest(const ResponseProvider::Request& request);
-  // Converts |url| to a path on the app bundle. Used to resolve URLs on to the
-  // app bundle.
-  base::FilePath BuildTargetPath(const GURL& url);
-
- private:
-  // The path according to which URLs are resolved from.
-  base::FilePath path_;
-};
-}
-
-#endif  // IOS_WEB_PUBLIC_TEST_RESPONSE_PROVIDERS_FILE_BASED_RESPONSE_PROVIDER_IMPL_H_