[rAc OSX] Factor out AutofillHeader class to contain dialog header elements.

chrome/browser/ui/cocoa/autofill/autofill_header.h

 // Copyright 2013 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_UI_COCOA_AUTOFILL_AUTOFILL_OVERLAY_CONTROLLER_H_
-#define CHROME_BROWSER_UI_COCOA_AUTOFILL_AUTOFILL_OVERLAY_CONTROLLER_H_
+#ifndef CHROME_BROWSER_UI_COCOA_AUTOFILL_AUTOFILL_HEADER_H_
+#define CHROME_BROWSER_UI_COCOA_AUTOFILL_AUTOFILL_HEADER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
-#include "base/memory/scoped_ptr.h"
 #import "chrome/browser/ui/cocoa/autofill/autofill_layout.h"
 
 namespace autofill {
 class AutofillDialogViewDelegate;
-struct DialogOverlayState;
 }  // autofill
 
-@class AutofillMessageView;
+@class AutofillAccountChooser;
 
-@interface AutofillOverlayController : NSViewController<AutofillLayout> {
+@interface AutofillHeader : NSViewController<AutofillLayout> {
  @private
-  base::scoped_nsobject<NSImageView> imageView_;
-  base::scoped_nsobject<AutofillMessageView> messageView_;
+  base::scoped_nsobject<AutofillAccountChooser> accountChooser_;
+  base::scoped_nsobject<NSTextField> title_;
+  // TODO(isherman): Include notifications in the header.
 
   autofill::AutofillDialogViewDelegate* delegate_;  // not owned, owns dialog.
 }
 
 // Designated initializer.
 - (id)initWithDelegate:(autofill::AutofillDialogViewDelegate*)delegate;
 
-// Updates the state from the dialog controller.
-- (void)updateState;
+// Returns the anchor view for notifications, which is the middle of the account
+// chooser view.
+- (NSView*)anchorView;
+
+// Updates the header's state from the dialog controller.
+- (void)update;
 
 // Get the preferred view height for a given width.
 - (CGFloat)heightForWidth:(int)width;
 
 @end
 
-#endif  // CHROME_BROWSER_UI_COCOA_AUTOFILL_AUTOFILL_OVERLAY_CONTROLLER_H_
+#endif  // CHROME_BROWSER_UI_COCOA_AUTOFILL_AUTOFILL_DIALOG_HEADER_H_