Add enable-offlining-recent-pages feature switch.

components/offline_pages/offline_page_model_unittest.cc

Index: components/offline_pages/offline_page_model_unittest.cc
diff --git a/components/offline_pages/offline_page_model_unittest.cc b/components/offline_pages/offline_page_model_unittest.cc
index 253dc67da9e427671da31095bbe886f1f17cad82..b3bc692eb12070157b0fd069437b2a643c2e9984 100644
--- a/components/offline_pages/offline_page_model_unittest.cc
+++ b/components/offline_pages/offline_page_model_unittest.cc
@@ -9,6 +9,7 @@
 #include <utility>
 
 #include "base/bind.h"
+#include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/run_loop.h"
@@ -24,7 +25,9 @@
 #include "components/bookmarks/browser/bookmark_undo_delegate.h"
 #include "components/bookmarks/browser/bookmark_undo_provider.h"
 #include "components/bookmarks/test/test_bookmark_client.h"
+#include "components/offline_pages/offline_page_feature.h"
 #include "components/offline_pages/offline_page_item.h"
+#include "components/offline_pages/offline_page_switches.h"
 #include "components/offline_pages/offline_page_test_archiver.h"
 #include "components/offline_pages/offline_page_test_store.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -917,4 +920,19 @@ TEST_F(OfflinePageModelBookmarkChangeTest, UndoBookmarkRemoval) {
   EXPECT_EQ(1UL, model()->GetAllPages().size());
 }
 
+TEST(CommandLineFlagsTest, OffliningRecentPages) {
+  // TODO(dimich): once offline pages are enabled by default, remove this.
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kEnableOfflinePages);
+
+  // Disabled by default.
+  EXPECT_FALSE(IsOffliningRecentPagesEnabled());
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kEnableOffliningRecentPages);
+  EXPECT_TRUE(IsOffliningRecentPagesEnabled());
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kDisableOffliningRecentPages);
+  EXPECT_FALSE(IsOffliningRecentPagesEnabled());
+}
+
 }  // namespace offline_pages