Warn users about potentially unwanted downloads.

chrome/browser/extensions/api/downloads/downloads_api.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/extensions/api/downloads/downloads_api.h"
 
 #include <algorithm>
 #include <cctype>
 #include <iterator>
 #include <set>
@@ skipping 88 matching lines @@
 const int  kDefaultIconSize = 32;
 
 // Parameter keys
 const char kBytesReceivedKey[] = "bytesReceived";
 const char kDangerAcceptedKey[] = "dangerAccepted";
 const char kDangerContent[] = "content";
 const char kDangerFile[] = "file";
 const char kDangerKey[] = "danger";
 const char kDangerSafe[] = "safe";
 const char kDangerUncommon[] = "uncommon";
+const char kDangerUnwanted[] = "unwanted";
 const char kDangerAccepted[] = "accepted";
 const char kDangerHost[] = "host";
 const char kDangerUrl[] = "url";
 const char kEndTimeKey[] = "endTime";
 const char kEndedAfterKey[] = "endedAfter";
 const char kEndedBeforeKey[] = "endedBefore";
 const char kErrorKey[] = "error";
 const char kExistsKey[] = "exists";
 const char kFileSizeKey[] = "fileSize";
 const char kFilenameKey[] = "filename";
@@ skipping 20 matching lines @@
 // corresponding change to downloads.json.
 const char* kDangerStrings[] = {
   kDangerSafe,
   kDangerFile,
   kDangerUrl,
   kDangerContent,
   kDangerSafe,
   kDangerUncommon,
   kDangerAccepted,
   kDangerHost,
+  kDangerUnwanted
 };
 COMPILE_ASSERT(arraysize(kDangerStrings) == content::DOWNLOAD_DANGER_TYPE_MAX,
                download_danger_type_enum_changed);
 
 // Note: Any change to the state strings, should be accompanied by a
 // corresponding change to downloads.json.
 const char* kStateStrings[] = {
   kStateInProgress,
   kStateComplete,
   kStateInterrupted,
@@ skipping 1342 matching lines @@
   DownloadsNotificationSource notification_source;
   notification_source.event_name = event_name;
   notification_source.profile = profile_;
   content::Source<DownloadsNotificationSource> content_source(
       &notification_source);
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_EXTENSION_DOWNLOADS_EVENT,
       content_source,
       content::Details<std::string>(&json_args));
 }