Convert remaining StringToLowerASCII to ToLowerASCII

sql/statement.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/statement.h"
 
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "third_party/sqlite/sqlite3.h"
@@ skipping 192 matching lines @@
   static_assert(COLUMN_TYPE_INTEGER == SQLITE_INTEGER, "integer no match");
   static_assert(COLUMN_TYPE_FLOAT == SQLITE_FLOAT, "float no match");
   static_assert(COLUMN_TYPE_TEXT == SQLITE_TEXT, "integer no match");
   static_assert(COLUMN_TYPE_BLOB == SQLITE_BLOB, "blob no match");
   static_assert(COLUMN_TYPE_NULL == SQLITE_NULL, "null no match");
 
   return static_cast<ColType>(sqlite3_column_type(ref_->stmt(), col));
 }
 
 ColType Statement::DeclaredColumnType(int col) const {
-  std::string column_type(sqlite3_column_decltype(ref_->stmt(), col));
-  base::StringToLowerASCII(&column_type);
+  std::string column_type = base::ToLowerASCII(
+      sqlite3_column_decltype(ref_->stmt(), col));
 
   if (column_type == "integer")
     return COLUMN_TYPE_INTEGER;
   else if (column_type == "float")
     return COLUMN_TYPE_FLOAT;
   else if (column_type == "text")
     return COLUMN_TYPE_TEXT;
   else if (column_type == "blob")
     return COLUMN_TYPE_BLOB;
 
@@ skipping 124 matching lines @@
 
 int Statement::CheckError(int err) {
   // Please don't add DCHECKs here, OnSqliteError() already has them.
   succeeded_ = (err == SQLITE_OK || err == SQLITE_ROW || err == SQLITE_DONE);
   if (!succeeded_ && ref_.get() && ref_->connection())
     return ref_->connection()->OnSqliteError(err, this, NULL);
   return err;
 }
 
 }  // namespace sql