Prepare declarativeContent API for new script injection feature. Added Javascript types and functio…

chrome/browser/extensions/api/declarative_content/content_constants.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/declarative_content/content_constants.h"
 
 namespace extensions {
 namespace declarative_content_constants {
 
 // Signals to which ContentRulesRegistries are registered.
 const char kOnPageChanged[] = "declarativeContent.onPageChanged";
+const char kOnDocumentStart[] = "declarativeContent.onDocumentStart";
+const char kOnDocumentEnd[] = "declarativeContent.onDocumentEnd";
+const char kOnDocumentIdle[] = "declarativeContent.onDocumentIdle";
 
 // Keys of dictionaries.
 const char kCss[] = "css";
 const char kInstanceType[] = "instanceType";
 const char kPageUrl[] = "pageUrl";
 
 // Values of dictionaries, in particular instance types
 const char kPageStateMatcherType[] = "declarativeContent.PageStateMatcher";
 const char kShowPageAction[] = "declarativeContent.ShowPageAction";
+const char kRequestContentScript[] = "declarativeContent.RequestContentScript";
 
 }  // namespace declarative_content_constants
 }  // namespace extensions