Fetch images for ContentSuggestions

ios/chrome/browser/ui/content_suggestions/content_suggestions_image_fetcher.h

+// Copyright 2017 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_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_IMAGE_UPDATER_H_
+#define IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_IMAGE_UPDATER_H_
+
+#import <Foundation/Foundation.h>
+
+namespace gfx {
+class Image;
+}
+
+@class ContentSuggestionIdentifier;
+
+// Protocol for an object able to fetch the image associated with a suggestion.
+@protocol ContentSuggestionsImageFetcher
+
+// Fetches the image associated with the |suggestionIdentifier| and passes it to
+// the |callback|.
+- (void)fetchImageForSuggestion:
+            (ContentSuggestionIdentifier*)suggestionIdentifier
+                       callback:(void (^)(const gfx::Image&))callback;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_IMAGE_UPDATER_H_