Fix to problem of chrome.runtime sometimes not being defined.

chrome/renderer/resources/extensions/last_error.js

Index: chrome/renderer/resources/extensions/last_error.js
diff --git a/chrome/renderer/resources/extensions/last_error.js b/chrome/renderer/resources/extensions/last_error.js
index 66f69f5150da75d238126cfa15b1681d4b507b90..2b38a2910e4a5dfa9b0acef1a246ed6c042ffd73 100644
--- a/chrome/renderer/resources/extensions/last_error.js
+++ b/chrome/renderer/resources/extensions/last_error.js
@@ -2,8 +2,10 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+requireNative('runtime');
+
 function set(message) {
-  var errorObject = { "message": message };
+  var errorObject = { 'message': message };
   if (chrome.extension)
     chrome.extension.lastError = errorObject;
   chrome.runtime.lastError = errorObject;