Add enable-offlining-recent-pages feature switch.

components/offline_pages/offline_page_model_unittest.cc

 // Copyright 2015 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 "components/offline_pages/offline_page_model.h"
 
 #include <stdint.h>
 #include <algorithm>
 #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"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/test_mock_time_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/time/time.h"
 #include "components/bookmarks/browser/bookmark_client.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/bookmarks/browser/bookmark_node.h"
 #include "components/bookmarks/browser/bookmark_storage.h"
 #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"
 #include "url/gurl.h"
 
 using SavePageResult = offline_pages::OfflinePageModel::SavePageResult;
 using DeletePageResult = offline_pages::OfflinePageModel::DeletePageResult;
 
 namespace offline_pages {
 
@@ skipping 872 matching lines @@
   bookmark_model()->Remove(bookmark_node);
   PumpLoop();
   EXPECT_EQ(0UL, model()->GetAllPages().size());
 
   // The offline copy should be restored upon the bookmark restore.
   UndoBookmarkRemoval();
   PumpLoop();
   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