Upstream Chrome on iOS source code [3/11].

ios/chrome/browser/ui/authentication/authentication_ui_util.mm

+// Copyright 2014 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.
+
+#import "ios/chrome/browser/ui/authentication/authentication_ui_util.h"
+
+#include "base/format_macros.h"
+#include "base/logging.h"
+#include "components/strings/grit/components_strings.h"
+#include "ios/chrome/browser/ui/alert_coordinator/alert_coordinator.h"
+#include "ios/chrome/grit/ios_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+
+namespace ios_internal {
+
+AlertCoordinator* ErrorCoordinator(NSError* error,
+                                   ProceduralBlock dismissAction,
+                                   UIViewController* viewController) {
+  DCHECK(error);
+
+  AlertCoordinator* alertCoordinator =
+      ErrorCoordinatorNoItem(error, viewController);
+
+  NSString* okButtonLabel = l10n_util::GetNSString(IDS_OK);
+  [alertCoordinator addItemWithTitle:okButtonLabel
+                              action:dismissAction
+                               style:UIAlertActionStyleDefault];
+
+  [alertCoordinator setCancelAction:dismissAction];
+
+  return alertCoordinator;
+}
+
+AlertCoordinator* ErrorCoordinatorNoItem(NSError* error,
+                                         UIViewController* viewController) {
+  DCHECK(error);
+
+  NSString* title = l10n_util::GetNSString(
+      IDS_IOS_SYNC_AUTHENTICATION_ERROR_ALERT_VIEW_TITLE);
+  NSString* errorMessage;
+  if ([NSURLErrorDomain isEqualToString:error.domain] &&
+      error.code == kCFURLErrorCannotConnectToHost) {
+    errorMessage =
+        l10n_util::GetNSString(IDS_IOS_SYNC_ERROR_INTERNET_DISCONNECTED);
+  } else if ([error.userInfo objectForKey:NSLocalizedDescriptionKey]) {
+    errorMessage = [NSString stringWithFormat:@"%@ (%@ %" PRIdNS ")",
+                                              error.localizedDescription,
+                                              error.domain, error.code];
+  } else {
+    // If the error has no NSLocalizedDescriptionKey in its user info, then
+    // |error.localizedDescription| contains the error domain and code.
+    errorMessage = error.localizedDescription;
+  }
+  AlertCoordinator* alertCoordinator = [[[AlertCoordinator alloc]
+      initWithBaseViewController:viewController
+                           title:title
+                         message:errorMessage] autorelease];
+  return alertCoordinator;
+}
+
+}  // namespace ios_internal