[NTP::Cleanup] Remove RecentTabs and PhysicalWeb suggestion flags.

Bug: 740036
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I4673189e0825b79c4e978ba0a7f03435e3431ff4
Reviewed-on: https://chromium-review.googlesource.com/563303Reviewed-by: Nicolas Dossou-Gbété <dgn@chromium.org>
Commit-Queue: vitaliii <vitaliii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#484914}

chrome/browser/about_flags.cc

@@ -2413,11 +2413,6 @@ const FeatureEntry kFeatureEntries[] = {
          ntp_snippets::kArticleSuggestionsFeature,
          kRemoteSuggestionsFeatureVariations,
          ntp_snippets::kArticleSuggestionsFeature.name)},
-    {"enable-ntp-recent-offline-tab-suggestions",
-     flag_descriptions::kEnableNtpRecentOfflineTabSuggestionsName,
-     flag_descriptions::kEnableNtpRecentOfflineTabSuggestionsDescription,
-     kOsAndroid,
-     FEATURE_VALUE_TYPE(ntp_snippets::kRecentOfflineTabSuggestionsFeature)},
     {"enable-ntp-asset-download-suggestions",
      flag_descriptions::kEnableNtpAssetDownloadSuggestionsName,
      flag_descriptions::kEnableNtpAssetDownloadSuggestionsDescription,
@@ -2432,11 +2427,6 @@ const FeatureEntry kFeatureEntries[] = {
      flag_descriptions::kEnableNtpBookmarkSuggestionsName,
      flag_descriptions::kEnableNtpBookmarkSuggestionsDescription, kOsAndroid,
      FEATURE_VALUE_TYPE(ntp_snippets::kBookmarkSuggestionsFeature)},
-    {"enable-ntp-physical-web-page-suggestions",
-     flag_descriptions::kEnableNtpPhysicalWebPageSuggestionsName,
-     flag_descriptions::kEnableNtpPhysicalWebPageSuggestionsDescription,
-     kOsAndroid,
-     FEATURE_VALUE_TYPE(ntp_snippets::kPhysicalWebPageSuggestionsFeature)},
     {"enable-ntp-foreign-sessions-suggestions",
      flag_descriptions::kEnableNtpForeignSessionsSuggestionsName,
      flag_descriptions::kEnableNtpForeignSessionsSuggestionsDescription,

chrome/browser/flag_descriptions.cc

@@ -2397,14 +2397,6 @@ const char kEnableNtpRemoteSuggestionsDescription[] =
     "allows to override the source used to retrieve these server-side "
     "suggestions.";
 
-const char kEnableNtpRecentOfflineTabSuggestionsName[] =
-    "Show recent offline tabs on the New Tab page";
-
-const char kEnableNtpRecentOfflineTabSuggestionsDescription[] =
-    "If enabled, the list of content suggestions on the New Tab page will "
-    "contain pages that were captured offline during browsing (see "
-    "#offlining-recent-pages)";
-
 const char kEnableNtpAssetDownloadSuggestionsName[] =
     "Show asset downloads on the New Tab page";
 
@@ -2427,14 +2419,6 @@ const char kEnableNtpBookmarkSuggestionsDescription[] =
     "If enabled, the list of content suggestions on the New Tab page will "
     "contain recently visited bookmarks.";
 
-const char kEnableNtpPhysicalWebPageSuggestionsName[] =
-    "Show Physical Web pages on the New Tab page";
-
-const char kEnableNtpPhysicalWebPageSuggestionsDescription[] =
-    "If enabled, the list of content suggestions on the New Tab page will "
-    "contain pages that are available through Physical Web (see "
-    "#enable-physical-web)";
-
 const char kEnableNtpForeignSessionsSuggestionsName[] =
     "Show recent foreign tabs on the New Tab page";