Make miscellaneous_bindings.js not depend on onLoad().

chrome/renderer/resources/extensions/extension_custom_bindings.js

Index: chrome/renderer/resources/extensions/extension_custom_bindings.js
diff --git a/chrome/renderer/resources/extensions/extension_custom_bindings.js b/chrome/renderer/resources/extensions/extension_custom_bindings.js
index a6c69e76c63a60d5a14325f82cb49292962b30a3..be19e9c11b956ae421265991ab28c1f58ab4bf7e 100644
--- a/chrome/renderer/resources/extensions/extension_custom_bindings.js
+++ b/chrome/renderer/resources/extensions/extension_custom_bindings.js
@@ -10,6 +10,18 @@ var OpenChannelToExtension = extensionNatives.OpenChannelToExtension;
 
 var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
 
+var inIncognitoContext = requireNative('process').InIncognitoContext();
+
+chrome.extension = chrome.extension || {};
+
+var manifestVersion = requireNative('process').GetManifestVersion();
+if (manifestVersion < 2) {
+  chrome.self = chrome.extension;
+  chrome.extension.inIncognitoTab = inIncognitoContext;
+}
+
+chrome.extension.inIncognitoContext = inIncognitoContext;
+
 // This should match chrome.windows.WINDOW_ID_NONE.
 //
 // We can't use chrome.windows.WINDOW_ID_NONE directly because the