Add enable-offlining-recent-pages feature switch.

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 307833662ae3ef80075b5fe2d9e2544f659d7d7e..6b4dc043b7d8d2d884318a70a98cefc5f21e5302 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1821,6 +1821,13 @@ const FeatureEntry kFeatureEntries[] = {
      ENABLE_DISABLE_VALUE_TYPE(switches::kEnableImeThread,
                                switches::kDisableImeThread)},
 #endif  // defined(OS_ANDROID)
+#if defined(OS_ANDROID)
+    {"offlining-recent-pages", IDS_FLAGS_OFFLINING_RECENT_PAGES_NAME,
+     IDS_FLAGS_OFFLINING_RECENT_PAGES_DESCRIPTION, kOsAndroid,
+     ENABLE_DISABLE_VALUE_TYPE(switches::kEnableOffliningRecentPages,
+                               switches::kDisableOffliningRecentPages)},
+#endif  // defined(OS_ANDROID)
+
     // NOTE: Adding new command-line switches requires adding corresponding
     // entries to enum "LoginCustomFlags" in histograms.xml. See note in
     // histograms.xml and don't forget to run AboutFlagsHistogramTest unit test.