Send an webNavigation event for navigations triggered by window.history

chrome/browser/extensions/api/web_navigation/web_navigation_api_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/web_navigation/web_navigation_api_constants.h"
 
 namespace extensions {
 
 namespace web_navigation_api_constants {
 
 const char kErrorKey[] = "error";
 const char kFrameIdKey[] = "frameId";
 const char kReplacedTabIdKey[] = "replacedTabId";
 const char kSourceTabIdKey[] = "sourceTabId";
 const char kSourceFrameIdKey[] = "sourceFrameId";
 const char kTabIdKey[] = "tabId";
 const char kTimeStampKey[] = "timeStamp";
 const char kTransitionTypeKey[] = "transitionType";
 const char kTransitionQualifiersKey[] = "transitionQualifiers";
 const char kUrlKey[] = "url";
 
 const char kOnBeforeNavigate[] = "webNavigation.onBeforeNavigate";
 const char kOnCommitted[] = "webNavigation.onCommitted";
 const char kOnCompleted[] = "webNavigation.onCompleted";
 const char kOnCreatedNavigationTarget[] =
     "webNavigation.onCreatedNavigationTarget";
 const char kOnDOMContentLoaded[] =
     "webNavigation.onDOMContentLoaded";
+const char kOnHistoryStateUpdated[] = "webNavigation.onHistoryStateUpdated";
 const char kOnErrorOccurred[] = "webNavigation.onErrorOccurred";
 const char kOnReferenceFragmentUpdated[] =
     "webNavigation.onReferenceFragmentUpdated";
 const char kOnTabReplaced[] = "webNavigation.onTabReplaced";
 
 }  // namespace web_navigation_api_constants
 
 }  // namespace extensions