Revert of Record offline histograms with suffix via Histogram::FactoryGet

components/offline_pages/offline_page_storage_manager_unittest.cc

 // Copyright 2016 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_storage_manager.h"
 
 #include <stdint.h>
 #include <map>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/files/file_path.h"
 #include "base/test/simple_test_clock.h"
 #include "base/time/time.h"
 #include "components/offline_pages/archive_manager.h"
-#include "components/offline_pages/client_namespace_constants.h"
 #include "components/offline_pages/client_policy_controller.h"
 #include "components/offline_pages/offline_page_item.h"
 #include "components/offline_pages/offline_page_storage_manager.h"
 #include "components/offline_pages/offline_page_types.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using LifetimePolicy = offline_pages::LifetimePolicy;
 using ClearStorageResult =
     offline_pages::OfflinePageStorageManager::ClearStorageResult;
 using StorageStats = offline_pages::ArchiveManager::StorageStats;
 
 namespace offline_pages {
 
 namespace {
+const char kBookmarkNamespace[] = "bookmark";
+const char kLastNNamespace[] = "last_n";
 const GURL kTestUrl("http://example.com");
 const base::FilePath::CharType kFilePath[] = FILE_PATH_LITERAL("/data");
 const int64_t kTestFileSize = 500 * (1 << 10);
 const int64_t kFreeSpaceNormal = 100 * (1 << 20);
 
 enum TestOptions {
   DEFAULT = 1 << 0,
   EXPIRE_FAILURE = 1 << 1,
   DELETE_FAILURE = 1 << 2,
   EXPIRE_AND_DELETE_FAILURES = EXPIRE_FAILURE | DELETE_FAILURE,
@@ skipping 391 matching lines @@
   EXPECT_EQ(0, client()->GetTotalSize());
   EXPECT_EQ(5, total_cleared_times());
   EXPECT_EQ(ClearStorageResult::SUCCESS, last_clear_storage_result());
   // Number of removed pages should be the ones expired above and all the pages
   // initially created for last_n namespace.
   EXPECT_EQ(expired_page_count + 101,
             static_cast<int>(client()->GetRemovedPages().size()));
 }
 
 }  // namespace offline_pages