Mac: Add tabpose window

chrome/browser/cocoa/tabpose_window.h

Index: chrome/browser/cocoa/tabpose_window.h
diff --git a/chrome/browser/cocoa/tabpose_window.h b/chrome/browser/cocoa/tabpose_window.h
new file mode 100644
index 0000000000000000000000000000000000000000..50672144186f5c96788f7f0273ce4c8b37266f58
--- /dev/null
+++ b/chrome/browser/cocoa/tabpose_window.h
@@ -0,0 +1,36 @@
+// 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_COCOA_TABPOSE_WINDOW_H_
+#define CHROME_BROWSER_COCOA_TABPOSE_WINDOW_H_
+#pragma once
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/scoped_cftyperef.h"
+
+// A TabposeWindow shows an overview of open tabs and lets the user select a new
+// active tab. The window blocks clicks on the tab strip and the download
+// shelf. Every open browser window has its own overlay, and they are
+// independent of each other. 
+@interface TabposeWindow : NSWindow {
+ @private
+  // The root layer added to the content view. Covers the whole window.
+  CALayer* rootLayer_;  // weak
+
+  // The layer showing the background layer. Covers the whole visible area.
+  CALayer* bgLayer_;  // weak
+
+  scoped_cftyperef<CGColorRef> gray_;
+}
+
+// Shows a TabposeWindow on top of |parent|, with |rect| being the active area.
+// If |slomo| is YES, then the appearance animation is shown in slow motion.
+// The window blocks all keyboard and mouse events and releases itself when
+// closed.
++ (id)openTabposeFor:(NSWindow*)parent rect:(NSRect)rect slomo:(BOOL)slomo;
+@end
+
+#endif  // CHROME_BROWSER_COCOA_TABPOSE_WINDOW_H_
+