Mac: Add tooltip to download item.

chrome/browser/cocoa/download_item_controller.h

Index: chrome/browser/cocoa/download_item_controller.h
diff --git a/chrome/browser/cocoa/download_item_controller.h b/chrome/browser/cocoa/download_item_controller.h
index 7d7b7691193297b1916d4c613c193cc17f7bdbfe..3cf6c8e90e15382822d3c9e572471548f2646faf 100644
--- a/chrome/browser/cocoa/download_item_controller.h
+++ b/chrome/browser/cocoa/download_item_controller.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -86,6 +86,9 @@ class DownloadShelfContextMenuMac;
 // Returns the DownloadItem model object belonging to this item.
 - (DownloadItem*)download;
 
+// Updates the tooltip with the download's path.
+- (void)updateToolTip;
+
 // Handling of dangerous downloads
 - (void)clearDangerousMode;
 - (BOOL)isDangerousMode;