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diff --git a/chrome/browser/cocoa/clickhold_button_cell.h b/chrome/browser/cocoa/clickhold_button_cell.h
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+++ b/chrome/browser/cocoa/clickhold_button_cell.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_COCOA_CLICKHOLD_BUTTON_CELL_H_
+#define CHROME_BROWSER_COCOA_CLICKHOLD_BUTTON_CELL_H_
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/scoped_nsobject.h"
+#import "chrome/browser/cocoa/gradient_button_cell.h"
+
+// A button cell that implements "click hold" behavior after a specified
+// delay. If -setClickHoldTimeout: is never called, this behaves like a normal
+// button.
+
+@interface ClickHoldButtonCell : GradientButtonCell {
+ @private
+  BOOL enableClickHold_;
+  NSTimeInterval clickHoldTimeout_;
+  id clickHoldTarget_;                  // Weak.
+  SEL clickHoldAction_;
+  BOOL trackOnlyInRect_;
+  BOOL activateOnDrag_;
+}
+
+// Enable click-hold?
+@property(assign, nonatomic) BOOL enableClickHold;
+
+// Timeout is in seconds (at least 0.01, at most 3600).
+@property(assign, nonatomic) NSTimeInterval clickHoldTimeout;
+
+// Track only in the frame rectangle?
+@property(assign, nonatomic) BOOL trackOnlyInRect;
+
+// Activate (click-hold) immediately on drag?
+@property(assign, nonatomic) BOOL activateOnDrag;
+
+// Defines what to do when click-held (as per usual action/target).
+@property(assign, nonatomic) id clickHoldTarget;
+@property(assign, nonatomic) SEL clickHoldAction;
+
+@end  // @interface ClickHoldButtonCell
+
+#endif  // CHROME_BROWSER_COCOA_CLICKHOLD_BUTTON_CELL_H_