[iOS Clean] Added HTTP authentication dialog support.

ios/clean/chrome/browser/ui/dialogs/http_auth_dialogs/http_auth_dialog_coordinator.h

Index: ios/clean/chrome/browser/ui/dialogs/http_auth_dialogs/http_auth_dialog_coordinator.h
diff --git a/ios/clean/chrome/browser/ui/dialogs/http_auth_dialogs/http_auth_dialog_coordinator.h b/ios/clean/chrome/browser/ui/dialogs/http_auth_dialogs/http_auth_dialog_coordinator.h
new file mode 100644
index 0000000000000000000000000000000000000000..6e3f0ef7190ff2cad24bdadb1ee13959fe08e4de
--- /dev/null
+++ b/ios/clean/chrome/browser/ui/dialogs/http_auth_dialogs/http_auth_dialog_coordinator.h
@@ -0,0 +1,25 @@
+// Copyright 2017 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 IOS_CLEAN_CHROME_BROWSER_UI_DIALOGS_HTTP_AUTH_DIALOGS_HTTP_AUTH_DIALOG_COORDINATOR_H_
+#define IOS_CLEAN_CHROME_BROWSER_UI_DIALOGS_HTTP_AUTH_DIALOGS_HTTP_AUTH_DIALOG_COORDINATOR_H_
+
+#import <Foundation/Foundation.h>
+
+#import "ios/clean/chrome/browser/ui/dialogs/dialog_coordinator.h"
+
+@class HTTPAuthDialogRequest;
+
+// A coordinator for the UI elements used to present HTTP authentication
+// dialogs.
+@interface HTTPAuthDialogCoordinator : DialogCoordinator
+
+// Designated initializer to display a HTTP authentication dialog for |request|.
+- (instancetype)initWithRequest:(HTTPAuthDialogRequest*)request
+    NS_DESIGNATED_INITIALIZER;
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+#endif  // IOS_CLEAN_CHROME_BROWSER_UI_DIALOGS_HTTP_AUTH_DIALOGS_HTTP_AUTH_DIALOG_COORDINATOR_H_