Initial download shelf on OS X....

chrome/browser/cocoa/download_shelf_controller.h

+// 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.
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/scoped_ptr.h"
+
+class Browser;
+@class BrowserWindowController;
+class DownloadShelf;
+@class DownloadShelfView;
+
+// A controller class that manages the download shelf for one window.
+
+@interface DownloadShelfController : NSViewController {
+ @private
+  // Currently these two are always the same, but they mean slightly
+  // different things.  contentAreaHasOffset_ is an implementation
+  // detail of download shelf visibility.
+  BOOL contentAreaHasOffset_;
+  BOOL barIsVisible_;
+
+  scoped_ptr<DownloadShelf> bridge_;
+  NSView* contentArea_;
+  int shelfHeight_;
+};
+
+- (id)initWithBrowser:(Browser*)browser
+    contentArea:(NSView*)content;
+
+- (DownloadShelf*)bridge;
+- (BOOL)isVisible;
+
+- (IBAction)show:(id)sender;
+- (IBAction)hide:(id)sender;
+
+// TODO(thakis): this should internally build an item and get only
+// the model as parameter.
+- (void)addDownloadItem:(NSView*)view;
+
+// Resizes the download shelf based on the state of the content area.
+- (void)resizeDownloadShelf;
+
+@end