Remove ContentSuggestionsProvider::GetProvidedCategories().

components/ntp_snippets/content_suggestions_service.cc

 // 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.
 
 #include "components/ntp_snippets/content_suggestions_service.h"
 
 #include <algorithm>
 #include <iterator>
 
 #include "base/bind.h"
@@ skipping 134 matching lines @@
   observers_.AddObserver(observer);
 }
 
 void ContentSuggestionsService::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void ContentSuggestionsService::RegisterProvider(
     std::unique_ptr<ContentSuggestionsProvider> provider) {
   DCHECK(state_ == State::ENABLED);
-  for (Category category : provider->GetProvidedCategories()) {
-    DCHECK_NE(CategoryStatus::NOT_PROVIDED,
-              provider->GetCategoryStatus(category));
-    RegisterCategoryIfRequired(provider.get(), category);
-    NotifyCategoryStatusChanged(category);
-  }
   providers_.push_back(std::move(provider));
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // Private methods
 
 void ContentSuggestionsService::OnNewSuggestions(
     ContentSuggestionsProvider* provider,
     Category category,
     std::vector<ContentSuggestion> new_suggestions) {
@@ skipping 89 matching lines @@
   return true;
 }
 
 void ContentSuggestionsService::NotifyCategoryStatusChanged(Category category) {
   FOR_EACH_OBSERVER(
       Observer, observers_,
       OnCategoryStatusChanged(category, GetCategoryStatus(category)));
 }
 
 }  // namespace ntp_snippets