Implement the downloads in progress at exit dialog for Mac

chrome/browser/cocoa/browser_window_cocoa.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.
 
 #include "base/gfx/rect.h"
 #include "base/logging.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_utils.h"
 #include "chrome/browser/cocoa/browser_window_cocoa.h"
 #import "chrome/browser/cocoa/browser_window_controller.h"
@@ skipping 227 matching lines @@
 }
 
 void BrowserWindowCocoa::ShowSelectProfileDialog() {
   NOTIMPLEMENTED();
 }
 
 void BrowserWindowCocoa::ShowNewProfileDialog() {
   NOTIMPLEMENTED();
 }
 
+// We allow closing the window here since the real quit decision on Mac is made
+// in [AppController quit:].
 void BrowserWindowCocoa::ConfirmBrowserCloseWithPendingDownloads() {
-  NOTIMPLEMENTED();
-  browser_->InProgressDownloadResponse(false);
+  browser_->InProgressDownloadResponse(true);
 }
 
 void BrowserWindowCocoa::ShowHTMLDialog(HtmlDialogUIDelegate* delegate,
                                         gfx::NativeWindow parent_window) {
   NOTIMPLEMENTED();
 }
 
 void BrowserWindowCocoa::UserChangedTheme() {
   [controller_ userChangedTheme];
 }
@@ skipping 28 matching lines @@
       break;
   }
 }
 
 void BrowserWindowCocoa::DestroyBrowser() {
   [controller_ destroyBrowser];
 
   // at this point the controller is dead (autoreleased), so
   // make sure we don't try to reference it any more.
 }