[NTP::PhysicalWeb] Implement suggestion dismissal.

components/ntp_snippets/content_suggestions_provider.h

 // Copyright 2016 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 COMPONENTS_NTP_SNIPPETS_CONTENT_SUGGESTIONS_PROVIDER_H_
 #define COMPONENTS_NTP_SNIPPETS_CONTENT_SUGGESTIONS_PROVIDER_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 64 matching lines @@
   virtual ~ContentSuggestionsProvider();
 
   // Determines the status of the given |category|, see CategoryStatus.
   virtual CategoryStatus GetCategoryStatus(Category category) = 0;
 
   // Returns the meta information for the given |category|.
   virtual CategoryInfo GetCategoryInfo(Category category) = 0;
 
   // Dismisses the suggestion with the given ID. A provider needs to ensure that
   // a once-dismissed suggestion is never delivered again (through the
-  // Observer). The provider must not call Observer::OnSuggestionsChanged if the
+  // Observer). The provider must not call Observer::OnNewSuggestions if the
   // removal of the dismissed suggestion is the only change.
   virtual void DismissSuggestion(
       const ContentSuggestion::ID& suggestion_id) = 0;
 
   // Fetches the image for the suggestion with the given ID and returns it
   // through the callback. This fetch may occur locally or from the internet.
   // If that suggestion doesn't exist, doesn't have an image or if the fetch
   // fails, the callback gets a null image. The callback will not be called
   // synchronously.
   virtual void FetchSuggestionImage(const ContentSuggestion::ID& suggestion_id,
@@ skipping 53 matching lines @@
   CategoryFactory* category_factory() const { return category_factory_; }
 
  private:
   Observer* observer_;
   CategoryFactory* category_factory_;
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_CONTENT_SUGGESTIONS_PROVIDER_H_