Implement http auth login dialog for OS X.

chrome/browser/login_prompt_mac.h

+// Copyright (c) 2009 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 CHROME_BROWSER_LOGIN_PROMPT_MAC_H_
+#define CHROME_BROWSER_LOGIN_PROMPT_MAC_H_
+
+#import <Cocoa/Cocoa.h>
+
+class LoginHandlerMac;
+
+// Controller of the sheet used by LoginHandlerMac. Interface Builder wants
+// this to be in a .h file.
+@interface LoginHandlerSheet : NSWindowController {
+ @private
+  IBOutlet NSTextField* nameField_;
+  IBOutlet NSSecureTextField* passwordField_;
+  LoginHandlerMac* handler_;  // weak, owns us
+}
+- (id)initWithLoginHandler:(LoginHandlerMac*)handler;
+- (IBAction)loginPressed:(id)sender;
+- (IBAction)cancelPressed:(id)sender;
+- (void)sheetDidEnd:(NSWindow*)sheet
+         returnCode:(int)returnCode
+        contextInfo:(void *)contextInfo;
+@end
+
+#endif  // CHROME_BROWSER_LOGIN_PROMPT_MAC_H_