Warn users about potentially unwanted downloads.

chrome/browser/download/chrome_download_manager_delegate.cc

 // Copyright (c) 2012 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/download/chrome_download_manager_delegate.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 523 matching lines @@
             content::DOWNLOAD_DANGER_TYPE_DANGEROUS_CONTENT);
         break;
       case DownloadProtectionService::UNCOMMON:
         item->OnContentCheckCompleted(
             content::DOWNLOAD_DANGER_TYPE_UNCOMMON_CONTENT);
         break;
       case DownloadProtectionService::DANGEROUS_HOST:
         item->OnContentCheckCompleted(
             content::DOWNLOAD_DANGER_TYPE_DANGEROUS_HOST);
         break;
+      case DownloadProtectionService::POTENTIALLY_UNWANTED:

[benjhayden, 2013/07/22 20:16:19]

Maybe collapse these cases with item->OnContentCheckCompleted(result)?

[asanka, 2013/07/23 15:10:36]

Done.

+        item->OnContentCheckCompleted(
+            content::DOWNLOAD_DANGER_TYPE_POTENTIALLY_UNWANTED);
+        break;
     }
   }
 
   SafeBrowsingState* state = static_cast<SafeBrowsingState*>(
       item->GetUserData(&safe_browsing_id));
   state->SetVerdict(result);
 }
 
 // content::NotificationObserver implementation.
 void ChromeDownloadManagerDelegate::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
   DCHECK(type == chrome::NOTIFICATION_CRX_INSTALLER_DONE);
 
   registrar_.Remove(this,
                     chrome::NOTIFICATION_CRX_INSTALLER_DONE,
                     source);
 
   scoped_refptr<extensions::CrxInstaller> installer =
       content::Source<extensions::CrxInstaller>(source).ptr();
   content::DownloadOpenDelayedCallback callback =
       crx_installers_[installer.get()];
   crx_installers_.erase(installer.get());
   callback.Run(installer->did_handle_successfully());
 }