[Mac] Makes the download shelf auto-close after the user opens all downloads...

chrome/browser/ui/cocoa/download/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>
 
 #import "base/cocoa_protocols_mac.h"
 #include "base/scoped_nsobject.h"
 #include "base/scoped_ptr.h"
 #import "chrome/browser/ui/cocoa/view_resizer.h"
@@ skipping 34 matching lines @@
 
   scoped_ptr<DownloadShelf> bridge_;
 
   // Height of the shelf when it's fully visible.
   CGFloat maxShelfHeight_;
 
   // Current height of the shelf. Changes while the shelf is animating in or
   // out.
   CGFloat currentShelfHeight_;
 
+  // Used to autoclose the shelf when the mouse is moved off it.  Is non-nil
+  // only when a subsequent mouseExited event can trigger autoclose or when a
+  // subsequent mouseEntered event will cancel autoclose.  Is nil otherwise.
+  scoped_nsobject<NSTrackingArea> trackingArea_;
+
   // The download items we have added to our shelf.
   scoped_nsobject<NSMutableArray> downloadItemControllers_;
 
   // The container that contains (and clamps) all the download items.
   IBOutlet NSView* itemContainerView_;
 
   // Delegate that handles resizing our view.
   id<ViewResizer> resizeDelegate_;
 };
 
@@ skipping 11 matching lines @@
 - (IBAction)show:(id)sender;
 
 // Run when the user clicks the close button on the right side of the shelf.
 - (IBAction)hide:(id)sender;
 
 - (void)addDownloadItem:(BaseDownloadItemModel*)model;
 
 // Remove a download, possibly via clearing browser data.
 - (void)remove:(DownloadItemController*)download;
 
+// Called by individual item controllers when their downloads are opened.
+- (void)downloadWasOpened:(DownloadItemController*)download;
+
 // Notification that we are closing and should release our downloads.
 - (void)exiting;
 
 // Return the height of the download shelf.
 - (float)height;
 
 // Re-layouts all download items based on their current state.
 - (void)layoutItems;
 
 @end