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diff --git a/chrome/browser/ui/cocoa/about_window_controller.h b/chrome/browser/ui/cocoa/about_window_controller.h
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+++ b/chrome/browser/ui/cocoa/about_window_controller.h
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+// 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_UI_COCOA_ABOUT_WINDOW_CONTROLLER_H_
+#define CHROME_BROWSER_UI_COCOA_ABOUT_WINDOW_CONTROLLER_H_
+#pragma once
+
+#import <AppKit/AppKit.h>
+
+@class BackgroundTileView;
+class Profile;
+
+// This simple subclass of |NSTextView| just doesn't show the (text) cursor
+// (|NSTextView| displays the cursor with full keyboard accessibility enabled).
+@interface AboutLegalTextView : NSTextView
+@end
+
+// A window controller that handles the About box.
+@interface AboutWindowController : NSWindowController {
+ @private
+  IBOutlet NSTextField* version_;
+  IBOutlet BackgroundTileView* backgroundView_;
+  IBOutlet NSImageView* logoView_;
+  IBOutlet NSView* legalBlock_;
+  IBOutlet AboutLegalTextView* legalText_;
+
+  // updateBlock_ holds the update image or throbber, update text, and update
+  // button.
+  IBOutlet NSView* updateBlock_;
+
+  IBOutlet NSProgressIndicator* spinner_;
+  IBOutlet NSImageView* updateStatusIndicator_;
+  IBOutlet NSTextField* updateText_;
+  IBOutlet NSButton* updateNowButton_;
+  IBOutlet NSButton* promoteButton_;
+
+  Profile* profile_;  // Weak, probably the default profile.
+
+  // The window frame height.  During an animation, this will contain the
+  // height being animated to.
+  CGFloat windowHeight_;
+}
+
+// Initialize the controller with the given profile, but does not show it.
+// Callers still need to call showWindow: to put it on screen.
+- (id)initWithProfile:(Profile*)profile;
+
+// Trigger an update right now, as initiated by a button.
+- (IBAction)updateNow:(id)sender;
+
+// Install a system Keystone if necessary and promote the ticket to a system
+// ticket.
+- (IBAction)promoteUpdater:(id)sender;
+
+@end  // @interface AboutWindowController
+
+@interface AboutWindowController(JustForTesting)
+
+- (NSTextView*)legalText;
+- (NSButton*)updateButton;
+- (NSTextField*)updateText;
+
+// Returns an NSAttributedString that contains locale-specific legal text.
++ (NSAttributedString*)legalTextBlock;
+
+@end  // @interface AboutWindowController(JustForTesting)
+
+#endif  // CHROME_BROWSER_UI_COCOA_ABOUT_WINDOW_CONTROLLER_H_