Revert of [sqlite] sql::Recovery working under USE_SYSTEM_SQLITE.

sql/recovery_unittest.cc

 // Copyright 2013 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 "sql/recovery.h"
 
 #include <stddef.h>
 #include <string>
 #include <utility>
 
@@ skipping 154 matching lines @@
   }
   EXPECT_FALSE(db().is_open());
   ASSERT_TRUE(Reopen());
   EXPECT_TRUE(db().is_open());
   ASSERT_EQ("CREATE TABLE x (t TEXT)", GetSchema(&db()));
 
   ASSERT_EQ("This is a test",
             ExecuteWithResults(&db(), kXSql, "|", "\n"));
 }
 
+// The recovery virtual table is only supported for Chromium's SQLite.
+#if !defined(USE_SYSTEM_SQLITE)
+
 // Test operation of the virtual table used by sql::Recovery.
 TEST_F(SQLRecoveryTest, VirtualTable) {
   const char kCreateSql[] = "CREATE TABLE x (t TEXT)";
   ASSERT_TRUE(db().Execute(kCreateSql));
   ASSERT_TRUE(db().Execute("INSERT INTO x VALUES ('This is a test')"));
   ASSERT_TRUE(db().Execute("INSERT INTO x VALUES ('That was a test')"));
 
   // Successfully recover the database.
   {
     scoped_ptr<sql::Recovery> recovery = sql::Recovery::Begin(&db(), db_path());
@@ skipping 542 matching lines @@
     ASSERT_TRUE(recovery->db()->Execute(kCreateSql));
 
     size_t rows = 0;
     EXPECT_TRUE(recovery->AutoRecoverTable("x", &rows));
     EXPECT_EQ(43u, rows);
 
     // Successfully recovered.
     EXPECT_TRUE(sql::Recovery::Recovered(std::move(recovery)));
   }
 }
+#endif  // !defined(USE_SYSTEM_SQLITE)
 
 // Memory-mapped I/O interacts poorly with I/O errors.  Make sure the recovery
 // database doesn't accidentally enable it.
 TEST_F(SQLRecoveryTest, NoMmap) {
   scoped_ptr<sql::Recovery> recovery = sql::Recovery::Begin(&db(), db_path());
   ASSERT_TRUE(recovery.get());
 
   // In the current implementation, the PRAGMA successfully runs with no result
   // rows.  Running with a single result of |0| is also acceptable.
   sql::Statement s(recovery->db()->GetUniqueStatement("PRAGMA mmap_size"));
   EXPECT_TRUE(!s.Step() || !s.ColumnInt64(0));
 }
 
 }  // namespace