Adding a flag for foreign sessions suggestions.

BUG=646951

Review-Url: https://codereview.chromium.org/2367133002
Cr-Commit-Position: refs/heads/master@{#420976}
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 7d8ce4b..bcc1bd9 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1928,6 +1928,10 @@
      IDS_FLAGS_ENABLE_NTP_PHYSICAL_WEB_PAGE_SUGGESTIONS_NAME,
      IDS_FLAGS_ENABLE_NTP_PHYSICAL_WEB_PAGE_SUGGESTIONS_DESCRIPTION, kOsAndroid,
      FEATURE_VALUE_TYPE(ntp_snippets::kPhysicalWebPageSuggestionsFeature)},
+    {"enable-ntp-foreign-sessions-suggestions",
+     IDS_FLAGS_ENABLE_NTP_FOREIGN_SESSIONS_SUGGESTIONS_NAME,
+     IDS_FLAGS_ENABLE_NTP_FOREIGN_SESSIONS_SUGGESTIONS_DESCRIPTION, kOsAndroid,
+     FEATURE_VALUE_TYPE(ntp_snippets::kForeignSessionsSuggestionsFeature)},
 #endif  // defined(OS_ANDROID)
 #if defined(ENABLE_WEBRTC) && BUILDFLAG(RTC_USE_H264) && \
     !defined(MEDIA_DISABLE_FFMPEG)