Replace GetAllErrorCodesForUma calls with UMA_HISTOGRAM_SPARSE_SLOWLY.

net/base/net_errors.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 "net/base/net_errors.h"
 
-#include "base/basictypes.h"
-#include "base/metrics/histogram.h"
-#include "base/strings/stringize_macros.h"
-
-namespace {
-
-// Get all valid error codes into an array as positive numbers, for use in the
-// |GetAllErrorCodesForUma| function below.
-#define NET_ERROR(label, value) -(value),
-const int kAllErrorCodes[] = {
-#include "net/base/net_error_list.h"
-};
-#undef NET_ERROR
-
-}  // namespace
-
 namespace net {
 
 const char kErrorDomain[] = "net";
 
 std::string ErrorToString(int error) {
   return "net::" + ErrorToShortString(error);
 }
 
 std::string ErrorToShortString(int error) {
   if (error == 0)
@@ skipping 28 matching lines @@
     case ERR_BAD_SSL_CLIENT_AUTH_CERT:
     case ERR_SSL_CLIENT_AUTH_PRIVATE_KEY_ACCESS_DENIED:
     case ERR_SSL_CLIENT_AUTH_CERT_NO_PRIVATE_KEY:
     case ERR_SSL_CLIENT_AUTH_SIGNATURE_FAILED:
       return true;
     default:
       return false;
   }
 }
 
-std::vector<int> GetAllErrorCodesForUma() {
-  return base::CustomHistogram::ArrayToCustomRanges(
-      kAllErrorCodes, arraysize(kAllErrorCodes));
-}
-
 Error FileErrorToNetError(base::File::Error file_error) {
   switch (file_error) {
     case base::File::FILE_OK:
       return OK;
     case base::File::FILE_ERROR_ACCESS_DENIED:
       return ERR_ACCESS_DENIED;
     case base::File::FILE_ERROR_INVALID_URL:
       return ERR_INVALID_URL;
     case base::File::FILE_ERROR_NOT_FOUND:
       return ERR_FILE_NOT_FOUND;
     default:
       return ERR_FAILED;
   }
 }
 
 }  // namespace net