Modified cancel and interrupt processing to avoid race with history.

chrome/browser/ui/cocoa/download/download_item_controller.mm

 // Copyright (c) 2011 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 "chrome/browser/ui/cocoa/download/download_item_controller.h"
 
 #include "base/mac/mac_util.h"
 #include "base/metrics/histogram.h"
 #include "base/string16.h"
 #include "base/string_util.h"
@@ skipping 333 matching lines @@
                            base::Time::Now() - creationTime_);
   // This will change the state and notify us.
   bridge_->download_model()->download()->DangerousDownloadValidated();
 }
 
 - (IBAction)discardDownload:(id)sender {
   UMA_HISTOGRAM_LONG_TIMES("clickjacking.discard_download",
                            base::Time::Now() - creationTime_);
   DownloadItem* download = bridge_->download_model()->download();
   if (download->IsPartialDownload())
-    download->Cancel(true);
+    download->Cancel();
   download->Delete(DownloadItem::DELETE_DUE_TO_USER_DISCARD);
   // WARNING: we are deleted at this point.  Don't access 'this'.
 }
 
 
 // Sets the enabled and checked state of a particular menu item for this
 // download. We translate the NSMenuItem selection to menu selections understood
 // by the non platform specific download context menu.
 - (BOOL)validateMenuItem:(NSMenuItem *)item {
   SEL action = [item action];
@@ skipping 45 matching lines @@
     [sender setTitle:l10n_util::GetNSStringWithFixup(
         IDS_DOWNLOAD_MENU_PAUSE_ITEM)];
   } else {
     [sender setTitle:l10n_util::GetNSStringWithFixup(
         IDS_DOWNLOAD_MENU_RESUME_ITEM)];
   }
   menuBridge_->ExecuteCommand(DownloadShelfContextMenuMac::TOGGLE_PAUSE);
 }
 
 @end