Implement the Extension History API, v 0.1....

chrome/renderer/resources/extension_process_bindings.js

 // Copyright (c) 2009 The chrome 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 216 matching lines @@
 
     // Read api definitions and setup api functions in the chrome namespace.
     // TODO(rafaelw): Consider defining a json schema for an api definition
     //   and validating either here, in a unit_test or both.
     // TODO(rafaelw): Handle synchronous functions.
     // TOOD(rafaelw): Consider providing some convenient override points
     //   for api functions that wish to insert themselves into the call.
     var apiDefinitions = JSON.parse(GetExtensionAPIDefinition());
 
     apiDefinitions.forEach(function(apiDef) {
-      chrome[apiDef.namespace] = chrome[apiDef.namespace] || {};
-      var module = chrome[apiDef.namespace];
+      var module = chrome;
+      var namespaces = apiDef.namespace.split('.');
+      for (var index = 0, name; name = namespaces[index]; index++) {
+        module[name] = module[name] || {};
+        module = module[name];
+      };
 
       // Add types to global validationTypes
       if (apiDef.types) {
         apiDef.types.forEach(function(t) {
           chromeHidden.validationTypes.push(t);
         });
       }
 
       // Setup Functions.
       if (apiDef.functions) {
@@ skipping 162 matching lines @@
     };
 
     apiFunctions["pageAction.setIcon"].handleRequest = function(details) {
       setIconCommon(details, this.name, this.definition.parameters);
     };
 
     setupBrowserActionEvent(extensionId);
     setupPageActionEvents(extensionId);
     setupToolstripEvents(GetRenderViewId());
   });
+
+  if (!chrome.experimental)
+    chrome.experimental = {};
+
+  if (!chrome.experimental.history)
+    chrome.experimental.history = {};
+
+  chrome.experimental.history.transistionType = {
+    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
+  };
 })();