Expose the "automatic downloads" content setting to extensions.

chrome/browser/extensions/api/content_settings/content_settings_helpers.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/content_settings/content_settings_helpers.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "content/public/common/url_constants.h"
@@ skipping 15 matching lines @@
   "location",
   "notifications",
   "auto-select-certificate",
   "fullscreen",
   "mouselock",
   "mixed-script",
   "media-stream",
   "media-stream-mic",
   "media-stream-camera",
   "register-protocol-handler",
-  "ppapi-broker"
+  "ppapi-broker",
+  "multiple-automatic-downloads"
 };
 
 // TODO(msramek): Assert that |kContentSettingsTypeNames| is synced with
 // enum |ContentSettingsType|.
 static_assert(arraysize(kContentSettingsTypeNames) <=
               CONTENT_SETTINGS_NUM_TYPES,
               "kContentSettingsTypeNames has an unexpected number of elements");
 
 const char* const kContentSettingNames[] = {
   "default",
@@ skipping 105 matching lines @@
 }
 
 const char* ContentSettingToString(ContentSetting setting) {
   size_t index = static_cast<size_t>(setting);
   DCHECK_LT(index, arraysize(kContentSettingNames));
   return kContentSettingNames[index];
 }
 
 }  // namespace content_settings_helpers
 }  // namespace extensions