Create ReadingListSuggestionsProvider

components/ntp_snippets/content_suggestions_metrics.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_metrics.h"
 
 #include <cmath>
 #include <string>
 #include <type_traits>
 
@@ skipping 58 matching lines @@
 // reorder elements, only add new ones at the end (before COUNT), and keep in
 // sync with ContentSuggestionsCategory in histograms.xml.
 enum HistogramCategories {
   EXPERIMENTAL,
   RECENT_TABS,
   DOWNLOADS,
   BOOKMARKS,
   PHYSICAL_WEB_PAGES,
   FOREIGN_TABS,
   ARTICLES,
+  READING_LIST,
   // Insert new values here!
   COUNT
 };
 
 HistogramCategories GetHistogramCategory(Category category) {
   static_assert(
       std::is_same<decltype(category.id()), typename base::underlying_type<
                                                 KnownCategories>::type>::value,
       "KnownCategories must have the same underlying type as category.id()");
   // Note: Since the underlying type of KnownCategories is int, it's legal to
   // cast from int to KnownCategories, even if the given value isn't listed in
   // the enumeration. The switch still makes sure that all known values are
   // listed here.
   auto known_category = static_cast<KnownCategories>(category.id());
   switch (known_category) {
     case KnownCategories::RECENT_TABS:
       return HistogramCategories::RECENT_TABS;
     case KnownCategories::DOWNLOADS:
       return HistogramCategories::DOWNLOADS;
     case KnownCategories::BOOKMARKS:
       return HistogramCategories::BOOKMARKS;
     case KnownCategories::PHYSICAL_WEB_PAGES:
       return HistogramCategories::PHYSICAL_WEB_PAGES;
     case KnownCategories::FOREIGN_TABS:
       return HistogramCategories::FOREIGN_TABS;
     case KnownCategories::ARTICLES:
       return HistogramCategories::ARTICLES;
+    case KnownCategories::READING_LIST:
+      return HistogramCategories::READING_LIST;
     case KnownCategories::LOCAL_CATEGORIES_COUNT:
     case KnownCategories::REMOTE_CATEGORIES_OFFSET:
       NOTREACHED();
       return HistogramCategories::COUNT;
   }
   // All other (unknown) categories go into a single "Experimental" bucket.
   return HistogramCategories::EXPERIMENTAL;
 }
 
 // Each suffix here should correspond to an entry under histogram suffix
 // ContentSuggestionCategory in histograms.xml.
 std::string GetCategorySuffix(Category category) {
   HistogramCategories histogram_category = GetHistogramCategory(category);
   switch (histogram_category) {
     case HistogramCategories::RECENT_TABS:
       return "RecentTabs";
     case HistogramCategories::DOWNLOADS:
       return "Downloads";
     case HistogramCategories::BOOKMARKS:
       return "Bookmarks";
     case HistogramCategories::PHYSICAL_WEB_PAGES:
       return "PhysicalWeb";
     case HistogramCategories::FOREIGN_TABS:
       return "ForeignTabs";
     case HistogramCategories::ARTICLES:
       return "Articles";
     case HistogramCategories::EXPERIMENTAL:
       return "Experimental";
+    case HistogramCategories::READING_LIST:
+      return "ReadingList";
     case HistogramCategories::COUNT:
       NOTREACHED();
       break;
   }
   return std::string();
 }
 
 std::string GetCategoryHistogramName(const char* base_name, Category category) {
   return base::StringPrintf(kPerCategoryHistogramFormat, base_name,
                             GetCategorySuffix(category).c_str());
@@ skipping 208 matching lines @@
 }
 
 void OnCategoryDismissed(Category category) {
   UMA_HISTOGRAM_ENUMERATION(kHistogramCategoryDismissed,
                             GetHistogramCategory(category),
                             HistogramCategories::COUNT);
 }
 
 }  // namespace metrics
 }  // namespace ntp_snippets