Mac: Add tooltip to download item.

chrome/browser/cocoa/download_item_mac.mm

-// 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.
 
 #include "chrome/browser/cocoa/download_item_mac.h"
 
 #include "base/callback.h"
 #include "chrome/browser/browser_process.h"
 #import "chrome/browser/cocoa/download_item_controller.h"
 #include "chrome/browser/cocoa/download_util_mac.h"
 #include "chrome/browser/download/download_item_model.h"
@@ skipping 20 matching lines @@
     // We have been approved.
     [item_controller_ clearDangerousMode];
   }
 
   if (download->full_path() != lastFilePath_) {
     // Turns out the file path is "unconfirmed %d.download" for dangerous
     // downloads. When the download is confirmed, the file is renamed on
     // another thread, so reload the icon if the download filename changes.
     LoadIcon();
     lastFilePath_ = download->full_path();
+
+    [item_controller_ updateToolTip];
   }
 
   switch (download->state()) {
     case DownloadItem::REMOVING:
       [item_controller_ remove];  // We're deleted now!
       break;
     case DownloadItem::COMPLETE:
       if (download->auto_opened()) {
         [item_controller_ remove];  // We're deleted now!
         return;
@@ skipping 32 matching lines @@
 }
 
 void DownloadItemMac::OnExtractIconComplete(IconManager::Handle handle,
                                             SkBitmap* icon_bitmap) {
   if (!icon_bitmap)
     return;
 
   NSImage* icon = gfx::SkBitmapToNSImage(*icon_bitmap);
   [item_controller_ setIcon:icon];
 }