[Remote suggestions] Add a remote suggestions flag to choose the source

chrome/browser/about_flags.cc

 // Copyright (c) 2012 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 "chrome/browser/about_flags.h"
 
 #include <iterator>
 #include <map>
 #include <set>
 #include <utility>
@@ skipping 543 matching lines @@
 
 const FeatureEntry::FeatureVariation
     kContentSuggestionsNotificationsFeatureVariations[] = {
         {"(notify always)",
          kContentSuggestionsNotificationsFeatureVariationAlways,
          arraysize(kContentSuggestionsNotificationsFeatureVariationAlways),
          nullptr}};
 #endif  // OS_ANDROID
 
 #if defined(OS_ANDROID)
-const FeatureEntry::FeatureParam kNTPSnippetsFeatureVariationChromeReader[] = {
-    {"content_suggestions_backend", ntp_snippets::kChromeReaderServer}};
+const FeatureEntry::FeatureParam
+    kRemoteSuggestionsFeatureVariationContentSuggestionsServer[] = {
+        {"content_suggestions_backend",
+         ntp_snippets::kContentSuggestionsServer}};
 
-const FeatureEntry::FeatureParam kNTPSnippetsFeatureVariationServer[] = {
-    {"content_suggestions_backend",
-     ntp_snippets::kContentSuggestionsServer}};
-
-const FeatureEntry::FeatureVariation kNTPSnippetsFeatureVariations[] = {
-    {"via ChromeReader", kNTPSnippetsFeatureVariationChromeReader,
-     arraysize(kNTPSnippetsFeatureVariationChromeReader), nullptr},
+const FeatureEntry::FeatureVariation kRemoteSuggestionsFeatureVariations[] = {
     {"via content suggestion server (backed by ChromeReader)",
-     kNTPSnippetsFeatureVariationServer,
-     arraysize(kNTPSnippetsFeatureVariationServer), nullptr},
+     kRemoteSuggestionsFeatureVariationContentSuggestionsServer,
+     arraysize(kRemoteSuggestionsFeatureVariationContentSuggestionsServer),
+     nullptr},
     {"via content suggestion server (backed by Google Now)",
-     kNTPSnippetsFeatureVariationServer,
-     arraysize(kNTPSnippetsFeatureVariationServer), "3313279"}};
+     kRemoteSuggestionsFeatureVariationContentSuggestionsServer,
+     arraysize(kRemoteSuggestionsFeatureVariationContentSuggestionsServer),
+     "3313279"}};
 #endif  // OS_ANDROID
 
 #if defined(OS_ANDROID)
 const FeatureEntry::FeatureParam kCondensedTileLayoutForSmallScreensEnabled[] =
     {{"condensed_tile_layout_for_small_screens_enabled", "true"}};
 
 const FeatureEntry::FeatureParam kCondensedTileLayoutForLargeScreensEnabled[] =
     {{"condensed_tile_layout_for_large_screens_enabled", "true"}};
 
 const FeatureEntry::FeatureVariation
@@ skipping 1289 matching lines @@
          ntp_snippets::kCategoryOrder,
          kContentSuggestionsCategoryOrderFeatureVariations,
          ntp_snippets::kStudyName)},
     {"content-suggestions-category-ranker",
      IDS_FLAGS_CONTENT_SUGGESTIONS_CATEGORY_RANKER_NAME,
      IDS_FLAGS_CONTENT_SUGGESTIONS_CATEGORY_RANKER_DESCRIPTION, kOsAndroid,
      FEATURE_WITH_VARIATIONS_VALUE_TYPE(
          ntp_snippets::kCategoryRanker,
          kContentSuggestionsCategoryRankerFeatureVariations,
          ntp_snippets::kStudyName)},
-    {"override-ntp-suggestions-source", IDS_FLAGS_OVERRIDE_SNIPPETS_SOURCE_NAME,
-     IDS_FLAGS_OVERRIDE_SNIPPETS_SOURCE_DESCRIPTION, kOsAndroid,
-     FEATURE_WITH_VARIATIONS_VALUE_TYPE(ntp_snippets::kContentSuggestionsSource,
-                                        kNTPSnippetsFeatureVariations,
-                                        ntp_snippets::kStudyName)},
     {"enable-ntp-snippets-increased-visibility",
      IDS_FLAGS_ENABLE_NTP_SNIPPETS_VISIBILITY_NAME,
      IDS_FLAGS_ENABLE_NTP_SNIPPETS_VISIBILITY_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(ntp_snippets::kIncreasedVisibility)},
     {"enable-ntp-save-to-offline", IDS_FLAGS_ENABLE_NTP_SAVE_TO_OFFLINE_NAME,
      IDS_FLAGS_ENABLE_NTP_SAVE_TO_OFFLINE_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(ntp_snippets::kSaveToOfflineFeature)},
     {"enable-ntp-offline-badge", IDS_FLAGS_ENABLE_NTP_OFFLINE_BADGE_NAME,
      IDS_FLAGS_ENABLE_NTP_OFFLINE_BADGE_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(ntp_snippets::kOfflineBadgeFeature)},
+    {"enable-ntp-remote-suggestions",
+     IDS_FLAGS_ENABLE_NTP_REMOTE_SUGGESTIONS_NAME,
+     IDS_FLAGS_ENABLE_NTP_REMOTE_SUGGESTIONS_DESCRIPTION, kOsAndroid,
+     FEATURE_WITH_VARIATIONS_VALUE_TYPE(
+         ntp_snippets::kArticleSuggestionsFeature,
+         kRemoteSuggestionsFeatureVariations,
+         ntp_snippets::kStudyName)},
     {"enable-ntp-recent-offline-tab-suggestions",
      IDS_FLAGS_ENABLE_NTP_RECENT_OFFLINE_TAB_SUGGESTIONS_NAME,
      IDS_FLAGS_ENABLE_NTP_RECENT_OFFLINE_TAB_SUGGESTIONS_DESCRIPTION,
      kOsAndroid,
      FEATURE_VALUE_TYPE(ntp_snippets::kRecentOfflineTabSuggestionsFeature)},
     {"enable-ntp-asset-download-suggestions",
      IDS_FLAGS_ENABLE_NTP_ASSET_DOWNLOAD_SUGGESTIONS_NAME,
      IDS_FLAGS_ENABLE_NTP_ASSET_DOWNLOAD_SUGGESTIONS_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(features::kAssetDownloadSuggestionsFeature)},
     {"enable-ntp-offline-page-download-suggestions",
@@ skipping 613 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags