Removed archived history file deletion on browser start

components/history/core/browser/history_backend_db_unittest.cc

 // Copyright (c) 2012 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.
 
 // History unit tests come in two flavors:
 //
 // 1. The more complicated style is that the unit test creates a full history
 //    service. This spawns a background thread for the history backend, and
 //    all communication is asynchronous. This is useful for testing more
 //    complicated things or end-to-end behavior.
@@ skipping 420 matching lines @@
     {
       sql::Statement s(db.GetUniqueStatement(
           "SELECT etag, last_modified from downloads"));
       EXPECT_TRUE(s.Step());
       EXPECT_EQ(std::string(), s.ColumnString(0));
       EXPECT_EQ(std::string(), s.ColumnString(1));
     }
   }
 }
 
-TEST_F(HistoryBackendDBTest, PurgeArchivedDatabase) {
-  ASSERT_NO_FATAL_FAILURE(CreateDBVersion(27));
-  ASSERT_NO_FATAL_FAILURE(CreateArchivedDB());
-
-  ASSERT_TRUE(base::PathExists(history_dir_.Append(kArchivedHistoryFilename)));
-
-  CreateBackendAndDatabase();
-  DeleteBackend();
-
-  // We do not retain expired history entries in an archived database as of M37.
-  // Verify that any legacy archived database is deleted on start-up.
-  ASSERT_FALSE(base::PathExists(history_dir_.Append(kArchivedHistoryFilename)));
-}
-
 TEST_F(HistoryBackendDBTest, MigrateDownloadMimeType) {
   base::Time now(base::Time::Now());
   ASSERT_NO_FATAL_FAILURE(CreateDBVersion(28));
   {
     sql::Connection db;
     ASSERT_TRUE(db.Open(history_dir_.Append(kHistoryFilename)));
     {
       sql::Statement s(db.GetUniqueStatement(
           "INSERT INTO downloads (id, current_path, target_path, start_time, "
           "received_bytes, total_bytes, state, danger_type, interrupt_reason, "
@@ skipping 323 matching lines @@
       // Current browser version must be already higher than 28.
       ASSERT_LT(28, HistoryDatabase::GetCurrentVersion());
       // Expect that version in DB remains the same.
       EXPECT_EQ(28, meta.GetVersionNumber());
     }
   }
 }
 
 }  // namespace
 }  // namespace history