Replace base::str[n]casecmp with helper functions.

sql/connection.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.
 
 #include "sql/connection.h"
 
 #include <string.h>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ skipping 974 matching lines @@
   sql.append(")");
 
   Statement statement(GetUntrackedStatement(sql.c_str()));
 
   // This can happen if the database is corrupt and the error is being ignored
   // for testing purposes.
   if (!statement.is_valid())
     return false;
 
   while (statement.Step()) {
-    if (!base::strcasecmp(statement.ColumnString(1).c_str(), column_name))
+    if (base::EqualsCaseInsensitiveASCII(statement.ColumnString(1),
+                                         column_name))
       return true;
   }
   return false;
 }
 
 int64_t Connection::GetLastInsertRowId() const {
   if (!db_) {
     DLOG_IF(FATAL, !poisoned_) << "Illegal use of connection without a db";
     return 0;
   }
@@ skipping 330 matching lines @@
   ignore_result(Execute(kNoWritableSchema));
 
   return ret;
 }
 
 base::TimeTicks TimeSource::Now() {
   return base::TimeTicks::Now();
 }
 
 }  // namespace sql