Add new user script injection point: document_idle.

chrome/common/extensions/extension_constants.cc

 // Copyright (c) 2009 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/extension_constants.h"
 
 namespace extension_manifest_keys {
 
 const wchar_t* kBackground = L"background_page";
 const wchar_t* kBrowserAction = L"browser_action";
@@ skipping 34 matching lines @@
 const wchar_t* kToolstrips = L"toolstrips";
 const wchar_t* kType = L"type";
 const wchar_t* kVersion = L"version";
 const wchar_t* kUpdateURL = L"update_url";
 const wchar_t* kOptionsPage = L"options_page";
 }  // namespace extension_manifest_keys
 
 namespace extension_manifest_values {
 const char* kRunAtDocumentStart = "document_start";
 const char* kRunAtDocumentEnd = "document_end";
+const char* kRunAtDocumentIdle = "document_idle";
 const char* kPageActionTypeTab = "tab";
 const char* kPageActionTypePermanent = "permanent";
 }  // namespace extension_manifest_values
 
 // Extension-related error messages. Some of these are simple patterns, where a
 // '*' is replaced at runtime with a specific value. This is used instead of
 // printf because we want to unit test them and scanf is hard to make
 // cross-platform.
 namespace extension_manifest_errors {
 const char* kInvalidBrowserAction =
@@ skipping 109 matching lines @@
     "An extension cannot have both a page action and a browser action.";
 const char* kThemesCannotContainExtensions =
     "A theme cannot contain extensions code.";
 const char* kLocalesNoDefaultLocaleSpecified =
     "Localization used, but default_locale wasn't specified in the manifest.";
 const char* kLocalesNoValidLocaleNamesListed =
     "No valid locale name could be found in _locales directory.";
 const char* kInvalidOptionsPage =
     "Invalid value for 'options_page'.";
 }  // namespace extension_manifest_errors