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diff --git a/chrome/browser/ui/cocoa/framed_browser_window.h b/chrome/browser/ui/cocoa/framed_browser_window.h
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+// Copyright (c) 2010 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_FRAMED_BROWSER_WINDOW_H_
+#define CHROME_BROWSER_UI_COCOA_FRAMED_BROWSER_WINDOW_H_
+#pragma once
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/scoped_nsobject.h"
+#include "chrome/browser/ui/cocoa/chrome_browser_window.h"
+
+// Offset from the top of the window frame to the top of the window controls
+// (zoom, close, miniaturize) for a window with a tabstrip.
+const NSInteger kFramedWindowButtonsWithTabStripOffsetFromTop = 6;
+
+// Offset from the top of the window frame to the top of the window controls
+// (zoom, close, miniaturize) for a window without a tabstrip.
+const NSInteger kFramedWindowButtonsWithoutTabStripOffsetFromTop = 4;
+
+// Offset from the left of the window frame to the top of the window controls
+// (zoom, close, miniaturize).
+const NSInteger kFramedWindowButtonsOffsetFromLeft = 8;
+
+// Offset between the window controls (zoom, close, miniaturize).
+const NSInteger kFramedWindowButtonsInterButtonSpacing = 7;
+
+// Cocoa class representing a framed browser window.
+// We need to override NSWindow with our own class since we need access to all
+// unhandled keyboard events and subclassing NSWindow is the only method to do
+// this. We also handle our own window controls and custom window frame drawing.
+@interface FramedBrowserWindow : ChromeBrowserWindow {
+ @private
+  BOOL shouldHideTitle_;
+  NSButton* closeButton_;
+  NSButton* miniaturizeButton_;
+  NSButton* zoomButton_;
+  BOOL entered_;
+  scoped_nsobject<NSTrackingArea> widgetTrackingArea_;
+}
+
+// Tells the window to suppress title drawing.
+- (void)setShouldHideTitle:(BOOL)flag;
+
+// Return true if the mouse is currently in our tracking area for our window
+// widgets.
+- (BOOL)mouseInGroup:(NSButton*)widget;
+
+// Update the tracking areas for our window widgets as appropriate.
+- (void)updateTrackingAreas;
+
+@end
+
+@interface NSWindow (UndocumentedAPI)
+
+// Undocumented Cocoa API to suppress drawing of the window's title.
+// -setTitle: still works, but the title set only applies to the
+// miniwindow and menus (and, importantly, Expose).  Overridden to
+// return |shouldHideTitle_|.
+-(BOOL)_isTitleHidden;
+
+@end
+
+#endif  // CHROME_BROWSER_UI_COCOA_FRAMED_BROWSER_WINDOW_H_