Warn users about potentially unwanted downloads.

chrome/browser/download/download_danger_prompt.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/download_danger_prompt.h"
 
 #include "base/bind.h"
 #include "chrome/browser/download/chrome_download_manager_delegate.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog.h"
 #include "chrome/browser/ui/tab_modal_confirm_dialog_delegate.h"
@@ skipping 106 matching lines @@
     case content::DOWNLOAD_DANGER_TYPE_DANGEROUS_URL: // Fall through
     case content::DOWNLOAD_DANGER_TYPE_DANGEROUS_CONTENT:
     case content::DOWNLOAD_DANGER_TYPE_DANGEROUS_HOST:
       return l10n_util::GetStringFUTF16(
           IDS_PROMPT_MALICIOUS_DOWNLOAD_CONTENT,
           download_->GetFileNameToReportUser().LossyDisplayName());
     case content::DOWNLOAD_DANGER_TYPE_UNCOMMON_CONTENT:
       return l10n_util::GetStringFUTF16(
           IDS_PROMPT_UNCOMMON_DOWNLOAD_CONTENT,
           download_->GetFileNameToReportUser().LossyDisplayName());
-    default:
-      NOTREACHED();
-      return string16();
+    case content::DOWNLOAD_DANGER_TYPE_POTENTIALLY_UNWANTED:
+      return l10n_util::GetStringFUTF16(
+          IDS_PROMPT_POTENTIALLY_UNWANTED_DOWNLOAD,
+          download_->GetFileNameToReportUser().LossyDisplayName());
+    case content::DOWNLOAD_DANGER_TYPE_NOT_DANGEROUS:
+    case content::DOWNLOAD_DANGER_TYPE_MAYBE_DANGEROUS_CONTENT:
+    case content::DOWNLOAD_DANGER_TYPE_USER_VALIDATED:
+    case content::DOWNLOAD_DANGER_TYPE_MAX:
+      break;
   }
+  NOTREACHED();
+  return string16();
 }
 
 string16 DownloadDangerPromptImpl::GetAcceptButtonTitle() {
   return l10n_util::GetStringUTF16(
       show_context_ ? IDS_CONFIRM_DOWNLOAD : IDS_CONFIRM_DOWNLOAD_AGAIN);
 }
 
 void DownloadDangerPromptImpl::OnAccepted() {
   RunCallback(accepted_);
 }
@@ skipping 29 matching lines @@
     content::WebContents* web_contents,
     bool show_context,
     const base::Closure& accepted,
     const base::Closure& canceled) {
   DownloadDangerPromptImpl* prompt = new DownloadDangerPromptImpl(
       item, show_context, accepted, canceled);
   // |prompt| will be deleted when the dialog is done.
   TabModalConfirmDialog::Create(prompt, web_contents);
   return prompt;
 }