Initialize content scripts the same way extension scripts are.

chrome/renderer/resources/extension_process_bindings.js

 // Copyright (c) 2011 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();
   native function StartRequest();
   native function GetCurrentPageActions(extensionId);
   native function GetExtensionViews();
   native function GetChromeHidden();
   native function GetNextRequestId();
   native function GetNextContextMenuId();
   native function GetNextTtsEventId();
   native function OpenChannelToTab();
   native function GetRenderViewId();
   native function SetIconCommon();
-  native function IsExtensionProcess();
-  native function IsIncognitoProcess();
   native function GetUniqueSubEventName(eventName);
   native function GetLocalFileSystem(name, path);
   native function DecodeJPEG(jpeg_image);
   native function Print();
 
   var chromeHidden = GetChromeHidden();
 
-  // These bindings are for the extension process only. Since a chrome-extension
-  // URL can be loaded in an iframe of a regular renderer, we check here to
-  // ensure we don't expose the APIs in that case.
-  if (!IsExtensionProcess()) {
-    chromeHidden.onLoad.addListener(function (extensionId) {
-      if (!extensionId) {
-        return;
-      }
-      chrome.initExtension(extensionId, false);
-    });
-    return;
-  }
-
   if (!chrome)
     chrome = {};
 
   function forEach(dict, f) {
     for (key in dict) {
       if (dict.hasOwnProperty(key))
         f(key, dict[key]);
     }
   }
 
@@ skipping 530 matching lines @@
     ];
 
     for (var i = 0; i < platforms.length; i++) {
       if (platforms[i][0].test(navigator.appVersion)) {
         return platforms[i][1];
       }
     }
     return "unknown";
   }
 
-  chromeHidden.onLoad.addListener(function (extensionId) {
-    if (!extensionId) {
+  chromeHidden.onLoad.addListener(function(extensionId, isExtensionProcess,
+                                           isIncognitoProcess) {
+    if (!isExtensionProcess)

[Matt Perry, 2011/08/24 22:11:34]

not all the extension-specific code is in this listener. see the end of the
file: we'll still end up exposing a stubbed-out chrome.experimental, chrome.tts,
etc. though maybe that's OK?

       return;
-    }
-    chrome.initExtension(extensionId, false, IsIncognitoProcess());
 
     // Setup the ChromeSetting class so we can use it to construct
     // ChromeSetting objects from the API definition.
     setupChromeSetting();
 
     // Setup the ContentSetting class so we can use it to construct
     // ContentSetting objects from the API definition.
     setupContentSetting();
 
     // |apiFunctions| is a hash of name -> object that stores the
@@ skipping 441 matching lines @@
 
   if (!chrome.tts)
     chrome.tts = {};
 
   if (!chrome.ttsEngine)
     chrome.ttsEngine = {};
 
   if (!chrome.experimental.downloads)
     chrome.experimental.downloads = {};
 })();