Move iOS ImageFetcher to ios/web/public

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_
+
+#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_