Fix include guards of files in src/ios.

ios/web/public/test/mock_image_data_fetcher.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_IMAGE_FETCHER_MOCK_IMAGE_DATA_FETCHER_H_
-#define IOS_WEB_PUBLIC_IMAGE_FETCHER_MOCK_IMAGE_DATA_FETCHER_H_
+#ifndef IOS_WEB_PUBLIC_TEST_MOCK_IMAGE_DATA_FETCHER_H_
+#define IOS_WEB_PUBLIC_TEST_MOCK_IMAGE_DATA_FETCHER_H_
 
 #import "ios/web/public/image_fetcher/image_data_fetcher.h"
 
 #include "testing/gmock/include/gmock/gmock.h"
 
 namespace web {
 
 // Mocks the ImageDataFetcher utility class, which can be used to asynchronously
 // retrieve an image from an URL.
 class MockImageDataFetcher : public ImageDataFetcher {
  public:
   explicit MockImageDataFetcher(
       const scoped_refptr<base::TaskRunner>& task_runner);
   ~MockImageDataFetcher() override;
 
   MOCK_METHOD4(StartDownload,
                void(const GURL& url,
                     ImageFetchedCallback callback,
                     const std::string& referrer,
                     net::URLRequest::ReferrerPolicy referrer_policy));
   MOCK_METHOD2(StartDownload,
                void(const GURL& url, ImageFetchedCallback callback));
   MOCK_METHOD1(SetRequestContextGetter,
                void(const scoped_refptr<net::URLRequestContextGetter>&
                         request_context_getter));
 };
 
 }  // namespace web
 
-#endif  // IOS_WEB_PUBLIC_IMAGE_FETCHER_MOCK_IMAGE_DATA_FETCHER_H_
+#endif  // IOS_WEB_PUBLIC_TEST_MOCK_IMAGE_DATA_FETCHER_H_