Add feature for condensed NTP tiles.

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 567 matching lines @@
      arraysize(kNTPSnippetsFeatureVariationChromeReader), nullptr},
     {"via content suggestion server (backed by ChromeReader)",
      kNTPSnippetsFeatureVariationServer,
      arraysize(kNTPSnippetsFeatureVariationServer), nullptr},
     {"via content suggestion server (backed by Google Now)",
      kNTPSnippetsFeatureVariationServer,
      arraysize(kNTPSnippetsFeatureVariationServer), "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
+    kNTPCondensedTileLayoutFeatureVariations[] = {
+        {"(small screens)", kCondensedTileLayoutForSmallScreensEnabled,
+         arraysize(kCondensedTileLayoutForSmallScreensEnabled), nullptr},
+        {"(large screens)", kCondensedTileLayoutForLargeScreensEnabled,
+         arraysize(kCondensedTileLayoutForLargeScreensEnabled), nullptr}};
+#endif  // OS_ANDROID
+
+#if defined(OS_ANDROID)
 const FeatureEntry::Choice kUpdateMenuItemSummaryChoices[] = {
     {IDS_FLAGS_UPDATE_MENU_ITEM_NO_SUMMARY, "", ""},
     {IDS_FLAGS_UPDATE_MENU_ITEM_DEFAULT_SUMMARY,
         switches::kForceShowUpdateMenuItemSummary, ""},
     {IDS_FLAGS_UPDATE_MENU_ITEM_NEW_FEATURES_SUMMARY,
         switches::kForceShowUpdateMenuItemNewFeaturesSummary, ""},
     {IDS_FLAGS_UPDATE_MENU_ITEM_CUSTOM_SUMMARY,
         switches::kForceShowUpdateMenuItemCustomSummary, "Custom summary"},
 };
 #endif  // OS_ANDROID
@@ skipping 1343 matching lines @@
     {"enable-ntp-suggestions-notifications",
      IDS_FLAGS_ENABLE_NTP_SUGGESTIONS_NOTIFICATIONS_NAME,
      IDS_FLAGS_ENABLE_NTP_SUGGESTIONS_NOTIFICATIONS_DESCRIPTION, kOsAndroid,
      FEATURE_WITH_VARIATIONS_VALUE_TYPE(
          params::ntp_snippets::kNotificationsFeature,
          kContentSuggestionsNotificationsFeatureVariations,
          ntp_snippets::kStudyName)},
     {"ntp-condensed-layout", IDS_FLAGS_NTP_CONDENSED_LAYOUT_NAME,
      IDS_FLAGS_NTP_CONDENSED_LAYOUT_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::kNTPCondensedLayoutFeature)},
+    {"ntp-condensed-tile-layout", IDS_FLAGS_NTP_CONDENSED_TILE_LAYOUT_NAME,
+     IDS_FLAGS_NTP_CONDENSED_TILE_LAYOUT_DESCRIPTION, kOsAndroid,
+     FEATURE_WITH_VARIATIONS_VALUE_TYPE(
+         chrome::android::kNTPCondensedTileLayoutFeature,
+         kNTPCondensedTileLayoutFeatureVariations,
+         ntp_snippets::kStudyName)},
     {"ntp-google-g-in-omnibox", IDS_FLAGS_NTP_GOOGLE_G_IN_OMNIBOX_NAME,
      IDS_FLAGS_NTP_GOOGLE_G_IN_OMNIBOX_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(chrome::android::NTPShowGoogleGInOmniboxFeature)},
 #endif  // OS_ANDROID
 #if BUILDFLAG(ENABLE_WEBRTC) && BUILDFLAG(RTC_USE_H264) && \
     !defined(MEDIA_DISABLE_FFMPEG)
     {"enable-webrtc-h264-with-openh264-ffmpeg",
      IDS_FLAGS_WEBRTC_H264_WITH_OPENH264_FFMPEG_NAME,
      IDS_FLAGS_WEBRTC_H264_WITH_OPENH264_FFMPEG_DESCRIPTION, kOsDesktop,
      FEATURE_VALUE_TYPE(content::kWebRtcH264WithOpenH264FFmpeg)},
@@ skipping 556 matching lines @@
 const base::HistogramBase::Sample kBadSwitchFormatHistogramId = 0;
 
 const FeatureEntry* GetFeatureEntries(size_t* count) {
   *count = arraysize(kFeatureEntries);
   return kFeatureEntries;
 }
 
 }  // namespace testing
 
 }  // namespace about_flags