Connect ContentSuggestionsMediator to the ContentService

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

Index: ios/chrome/browser/ui/content_suggestions/content_suggestions_image_updater.h
diff --git a/ios/chrome/browser/ui/content_suggestions/content_suggestions_image_updater.h b/ios/chrome/browser/ui/content_suggestions/content_suggestions_image_updater.h
new file mode 100644
index 0000000000000000000000000000000000000000..10684d1cdb023987d63e4d16dd04fcd398a2075e
--- /dev/null
+++ b/ios/chrome/browser/ui/content_suggestions/content_suggestions_image_updater.h
@@ -0,0 +1,35 @@
+// 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 <UIKit/UIKit.h>
+
+@class ContentSuggestionsArticleItem;
+@class ContentSuggestionsImageUpdater;
+
+// Delegate for ContentSuggestionsImageUpdater. It gets notified when the
+// ImageUpdater receive an image.

[lpromero, 2017/02/14 10:52:27]

receives

[gambard, 2017/02/14 14:03:43]

Done.

+@protocol ContentSuggestionsImageUpdaterDelegate
+
+- (void)contentSuggestionsImageUpdater:
+            (ContentSuggestionsImageUpdater*)imageUpdater
+                         receivedImage:(UIImage*)image;
+
+@end
+
+// When receiving an image, it notifies its delegate.
+@interface ContentSuggestionsImageUpdater : NSObject
+
+@property(nonatomic, weak) ContentSuggestionsArticleItem* item;
+@property(nonatomic, assign) NSInteger sectionIdentifier;

[lpromero, 2017/02/14 10:52:27]

Why are these needed?

[gambard, 2017/02/14 14:03:43]

To know the item associated with the ImageUpdater (to update the item and
reconfigure the associated cell).

[lpromero, 2017/02/14 15:43:32]

Ack.

+
+@property(nonatomic, weak) id<ContentSuggestionsImageUpdaterDelegate> delegate;
+
+- (void)receivedImage:(UIImage*)image;

[lpromero, 2017/02/14 10:52:27]

Unit test that the delegate is called, with the proper image.

[gambard, 2017/02/14 14:03:43]

Done.

+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_CONTENT_SUGGESTIONS_CONTENT_SUGGESTIONS_IMAGE_UPDATER_H_