First cut at infobars on Mac. These are not expected to be...

chrome/browser/cocoa/infobar_controller.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.
+
+#import <Cocoa/Cocoa.h>
+
+@class InfoBarContainerController;
+class InfoBarDelegate;
+
+// A controller for an infobar in the browser window.  There is one
+// controller per infobar view.  The base InfoBarController is able to
+// draw an icon, a text message, and a close button.  Subclasses can
+// override addAdditionalControls to customize the UI.
+@interface InfoBarController : NSViewController {
+ @private
+  InfoBarContainerController* containerController_;  // weak, owns us
+
+ @protected
+  InfoBarDelegate* delegate_;  // weak
+  IBOutlet NSImageView* image_;
+  IBOutlet NSTextField* label_;
+  IBOutlet NSButton* closeButton_;
+};
+
+// Initializes a new InfoBarController.
+- (id)initWithDelegate:(InfoBarDelegate*)delegate;
+
+// Dismisses the infobar without taking any action.
+- (IBAction)dismiss:(id)sender;
+
+// Subclasses can override this method to add additional controls to
+// the infobar view.  This method is called by awakeFromNib.  The
+// default implementation does nothing.
+- (void)addAdditionalControls;
+
+@property(assign, nonatomic) InfoBarContainerController* containerController;
+@property(readonly) InfoBarDelegate* delegate;
+
+@end
+
+/////////////////////////////////////////////////////////////////////////
+// InfoBarController subclasses, one for each InfoBarDelegate
+// subclass.  Each of these subclasses overrides addAdditionalControls to
+// configure its view as necessary.
+
+@interface AlertInfoBarController : InfoBarController {
+}
+@end
+
+
+@interface LinkInfoBarController : InfoBarController {
+}
+// Called when there is a click on the link in the infobar.
+- (void)linkClicked;
+@end
+
+
+@interface ConfirmInfoBarController : InfoBarController {
+}
+// Called when the ok and cancel buttons are clicked.
+- (IBAction)ok:(id)sender;
+- (IBAction)cancel:(id)sender;
+@end