Fix presubmit warnings on authpolicy credentials manager

Replaces the usage of banned method (std::to_string) on authpolicy
credentials manager files by the appropriated one. In this case, since
the notification_id is not an user-visible string, the
locale-independent method base::NumberToString will be used.


Bug: 1027241
Change-Id: I7884f0dbeabefa315d4b1c096c89654d4f5e9719
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1929811
Commit-Queue: Felipe Andrade <fsandrade@chromium.org>
Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#719116}

chrome/browser/chromeos/authpolicy/authpolicy_credentials_manager.cc

@@ -12,6 +12,7 @@
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/memory/singleton.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
@@ -260,7 +261,7 @@ void AuthPolicyCredentialsManager::ShowNotification(int message_id) {
 
   const std::string notification_id = kProfileSigninNotificationId +
                                       profile_->GetProfileUserName() +
-                                      std::to_string(message_id);
+                                      base::NumberToString(message_id);
   message_center::NotifierId notifier_id(
       message_center::NotifierType::SYSTEM_COMPONENT,
       kProfileSigninNotificationId);

chrome/browser/chromeos/authpolicy/authpolicy_credentials_manager_unittest.cc

@@ -8,6 +8,7 @@
 
 #include "base/macros.h"
 #include "base/run_loop.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chromeos/login/users/fake_chrome_user_manager.h"
 #include "chrome/browser/chromeos/login/users/mock_user_manager.h"
@@ -111,7 +112,7 @@ class AuthPolicyCredentialsManagerTest : public testing::Test {
   void CancelNotificationById(int message_id) {
     const std::string notification_id = kProfileSigninNotificationId +
                                         profile()->GetProfileUserName() +
-                                        std::to_string(message_id);
+                                        base::NumberToString(message_id);
     EXPECT_TRUE(display_service_->GetNotification(notification_id));
     display_service_->RemoveNotification(NotificationHandler::Type::TRANSIENT,
                                          notification_id, false);