Upstream iOS SuggestionsServiceFactory

ios/chrome/browser/suggestions/image_fetcher_impl.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 IOS_CHROME_BROWSER_SUGGESTIONS_IMAGE_FETCHER_IMPL_H_
+#define IOS_CHROME_BROWSER_SUGGESTIONS_IMAGE_FETCHER_IMPL_H_
+
+#include "base/callback_forward.h"
+#include "base/memory/scoped_ptr.h"
+#include "components/suggestions/image_fetcher.h"
+
+class GURL;
+class SkBitmap;
+
+namespace image_fetcher {
+class ImageFetcher;
+}
+
+namespace base {
+class SequencedWorkerPool;
+}
+
+namespace net {
+class URLRequestContextGetter;
+}
+
+namespace suggestions {
+
+class ImageFetcherDelegate;
+
+// A class used to fetch server images asynchronously.
+class ImageFetcherImpl : public suggestions::ImageFetcher {
+ public:
+  ImageFetcherImpl(net::URLRequestContextGetter* url_request_context,
+                   base::SequencedWorkerPool* blocking_pool);
+  ~ImageFetcherImpl() override;
+
+  void SetImageFetcherDelegate(ImageFetcherDelegate* delegate) override;
+
+  void StartOrQueueNetworkRequest(
+      const GURL& url,
+      const GURL& image_url,
+      base::Callback<void(const GURL&, const SkBitmap*)> callback) override;
+
+ private:
+  scoped_ptr<image_fetcher::ImageFetcher> imageFetcher_;
+
+  ImageFetcherDelegate* delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(ImageFetcherImpl);
+};
+
+}  // namespace suggestions
+
+#endif  // IOS_CHROME_BROWSER_SUGGESTIONS_IMAGE_FETCHER_IMPL_H_