Re-land alexbost's experimental Offscreen Tabs API work.

chrome/common/extensions/api/extension_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/common/extensions/api/extension_api.h"
 
 #include <string>
 #include <vector>
 
 #include "base/json/json_reader.h"
@@ skipping 56 matching lines @@
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_ACCESSIBILITY,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_APP,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_BOOKMARKMANAGER,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_CLEAR,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_DNS,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_DOWNLOADS,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_INFOBARS,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_INPUT_IME,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_INPUT_UI,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_INPUT_VIRTUALKEYBOARD,
+    IDR_EXTENSION_API_JSON_EXPERIMENTAL_OFFSCREENTABS,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_PRIVACY,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_PROCESSES,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_RLZ,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_SERIAL,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_SOCKET,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_SPEECHINPUT,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_STORAGE,
     IDR_EXTENSION_API_JSON_EXPERIMENTAL_TOPSITES,
     IDR_EXTENSION_API_JSON_EXTENSION,
     IDR_EXTENSION_API_JSON_FILEBROWSERHANDLER,
@@ skipping 113 matching lines @@
 void ExtensionAPI::GetSchemasForPermissions(
     const ExtensionPermissionSet& permissions, SchemaMap* out) const {
   for (SchemaMap::const_iterator it = schemas_.begin(); it != schemas_.end();
       ++it) {
     if (permissions.HasAnyAccessToAPI(it->first))
       (*out)[it->first] = it->second;
   }
 }
 
 }