Move history API out of experimental. Allow extensions to override history page.

chrome/renderer/resources/extension_process_bindings.js

 // Copyright (c) 2010 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.
 
 // This script contains privileged chrome extension related javascript APIs.
 // It is loaded by pages whose URL has the chrome-extension protocol.
 
 var chrome = chrome || {};
 (function() {
   native function GetExtensionAPIDefinition();
@@ skipping 601 matching lines @@
     setupToolstripEvents(GetRenderViewId());
     setupPopupEvents(GetRenderViewId());
     setupHiddenContextMenuEvent(extensionId);
   });
 
   if (!chrome.experimental)
     chrome.experimental = {};
 
   if (!chrome.experimental.accessibility)
     chrome.experimental.accessibility = {};
-
-  if (!chrome.experimental.history)
-    chrome.experimental.history = {};
-
-  chrome.experimental.history.transitionType = {
-    LINK: 0,
-    TYPED: 1,
-    AUTO_BOOKMARK: 2,
-    AUTO_SUBFRAME: 3,
-    MANUAL_SUBFRAME: 4,
-    GENERATED: 5,
-    START_PAGE: 6,
-    FORM_SUBMIT: 7,
-    RELOAD: 8,
-    KEYWORD: 9,
-    KEYWORD_GENERATED: 10
-  };
 })();