Remove ContentSuggestionsProvider::GetProvidedCategories().

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 <string>
 #include <vector>
 
@@ skipping 31 matching lines @@
     // that to clear them from the UI immediately, the provider needs to change
     // the status of the respective category. If the given |category| is not
     // known yet, the calling |provider| will be registered as its provider.
     // IDs for the ContentSuggestions should be generated with
     // |MakeUniqueID(..)| below.
     virtual void OnNewSuggestions(
         ContentSuggestionsProvider* provider,
         Category category,
         std::vector<ContentSuggestion> suggestions) = 0;
 
-    // Called when the status of a category changed.
+    // Called when the status of a category changed, including when it is added.
     // If |new_status| is NOT_PROVIDED, the calling provider must be the one
     // that currently provides the |category|, and the category is unregistered
-    // without clearing the UI. The |category| must also be removed from
-    // |GetProvidedCategories()|.
+    // without clearing the UI.
     // If |new_status| is any other value, it must match the value that is
     // currently returned from the provider's |GetCategoryStatus(category)|. In
     // case the given |category| is not known yet, the calling |provider| will
     // be registered as its provider. Whenever the status changes to an
     // unavailable status, all suggestions in that category must immediately be
     // removed from all caches and from the UI, but the provider remains
     // registered.
     virtual void OnCategoryStatusChanged(ContentSuggestionsProvider* provider,
                                          Category category,
                                          CategoryStatus new_status) = 0;
 
     // Called when a suggestion has been invalidated. It will not be provided
     // through |OnNewSuggestions| anymore, is not supported by
     // |FetchSuggestionImage| or |DismissSuggestion| anymore, and should
     // immediately be cleared from the UI and caches. This happens, for example,
     // when the content that the suggestion refers to is gone.
     // Note that this event may be fired even if the corresponding |category| is
     // not currently AVAILABLE, because open UIs may still be showing the
     // suggestion that is to be removed. This event may also be fired for
     // |suggestion_id|s that never existed and should be ignored in that case.
     virtual void OnSuggestionInvalidated(ContentSuggestionsProvider* provider,
                                          Category category,
                                          const std::string& suggestion_id) = 0;
   };
 
   virtual ~ContentSuggestionsProvider();
 
-  // Returns the categories provided by this provider.
-  // When the set of provided categories changes, the Observer is notified
-  // through |OnNewSuggestions| or |OnCategoryStatusChanged| for added
-  // categories, and through |OnCategoryStatusChanged| with parameter
-  // NOT_PROVIDED for removed categories.
-  virtual std::vector<Category> GetProvidedCategories() = 0;
-
   // 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
   // removal of the dismissed suggestion is the only change.
@@ skipping 46 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_