Remove last client of sql::DiagnosticErrorDelegate.

sql/error_delegate_util.h

 // 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.
 
 #ifndef SQL_ERROR_DELEGATE_UTIL_H_
 #define SQL_ERROR_DELEGATE_UTIL_H_
 
-#include "base/metrics/histogram.h"
-#include "sql/connection.h"
 #include "sql/sql_export.h"
 
 namespace sql {
 
 // Returns true if it is highly unlikely that the database can recover from
 // |error|.
 SQL_EXPORT bool IsErrorCatastrophic(int error);
 
-// Log error in console in debug mode and generate a UMA histogram in release
-// mode for |error| for |UniqueT::name()|.
-// This function is templated because histograms need to be singletons. That is
-// why they are always static at the function scope. The template parameter
-// makes the compiler create unique functions that don't share the same static
-// variable.
-template <class UniqueT>
-void LogAndRecordErrorInHistogram(int error,
-                                  sql::Connection* connection) {
-  LOG(ERROR) << "sqlite error " << error
-             << ", errno " << connection->GetLastErrno()
-             << ": " << connection->GetErrorMessage();
-
-  // Trim off the extended error codes.
-  error &= 0xff;
-
-  // The histogram values from sqlite result codes currently go from 1 to 26
-  // but 50 gives them room to grow.
-  UMA_HISTOGRAM_ENUMERATION(UniqueT::name(), error, 50);
-}
-
 }  // namespace sql
 
 #endif  // SQL_ERROR_DELEGATE_UTIL_H_