add "remove" to download item context menu on mac

chrome/browser/cocoa/download_item_controller.mm

 // 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 "chrome/browser/cocoa/download_item_controller.h"
 
 #include "base/mac_util.h"
 #import "chrome/browser/cocoa/download_item_cell.h"
 #include "chrome/browser/cocoa/download_item_mac.h"
 #include "chrome/browser/download/download_item_model.h"
 #include "chrome/browser/download/download_shelf.h"
 #include "chrome/browser/download/download_util.h"
 
 
 // A class for the chromium-side part of the download shelf context menu.
 
 class DownloadShelfContextMenuMac : public DownloadShelfContextMenu {
  public:
   DownloadShelfContextMenuMac(BaseDownloadItemModel* model)
       : DownloadShelfContextMenu(model) { }
 
   using DownloadShelfContextMenu::ExecuteItemCommand;
   using DownloadShelfContextMenu::ItemIsChecked;
   using DownloadShelfContextMenu::IsItemCommandEnabled;
 
   using DownloadShelfContextMenu::SHOW_IN_FOLDER;
   using DownloadShelfContextMenu::OPEN_WHEN_COMPLETE;
   using DownloadShelfContextMenu::ALWAYS_OPEN_TYPE;
   using DownloadShelfContextMenu::CANCEL;
+  using DownloadShelfContextMenu::REMOVE_ITEM;
 };
 
 
 // Implementation of DownloadItemController
 
 @implementation DownloadItemController
 
 - (id)initWithFrame:(NSRect)frameRect
               model:(BaseDownloadItemModel*)downloadModel
               shelf:(DownloadShelfController*)shelf {
@@ skipping 67 matching lines @@
 - (BOOL)validateMenuItem:(NSMenuItem *)item {
   SEL action = [item action];
 
   int actionId = 0;
   if (action == @selector(handleOpen:)) {
     actionId = DownloadShelfContextMenuMac::OPEN_WHEN_COMPLETE;
   } else if (action == @selector(handleAlwaysOpen:)) {
     actionId = DownloadShelfContextMenuMac::ALWAYS_OPEN_TYPE;
   } else if (action == @selector(handleReveal:)) {
     actionId = DownloadShelfContextMenuMac::SHOW_IN_FOLDER;
+  } else if (action == @selector(handleRemove:)) {
+    actionId = DownloadShelfContextMenuMac::REMOVE_ITEM;
   } else if (action == @selector(handleCancel:)) {
     actionId = DownloadShelfContextMenuMac::CANCEL;
   } else {
     NOTREACHED();
     return YES;
   }
 
   if (menuBridge_->ItemIsChecked(actionId))
     [item setState:NSOnState];
   else
     [item setState:NSOffState];
 
   return menuBridge_->IsItemCommandEnabled(actionId) ? YES : NO;
 }
 
 - (IBAction)handleOpen:(id)sender {
   menuBridge_->ExecuteItemCommand(
       DownloadShelfContextMenuMac::OPEN_WHEN_COMPLETE);
 }
 
 - (IBAction)handleAlwaysOpen:(id)sender {
   menuBridge_->ExecuteItemCommand(
       DownloadShelfContextMenuMac::ALWAYS_OPEN_TYPE);
 }
 
 - (IBAction)handleReveal:(id)sender {
   menuBridge_->ExecuteItemCommand(DownloadShelfContextMenuMac::SHOW_IN_FOLDER);
 }
 
+- (IBAction)handleRemove:(id)sender {
+  menuBridge_->ExecuteItemCommand(DownloadShelfContextMenuMac::REMOVE_ITEM);
+}
+
 - (IBAction)handleCancel:(id)sender {
   menuBridge_->ExecuteItemCommand(DownloadShelfContextMenuMac::CANCEL);
 }
 
 @end