| Index: chrome/ext/common.js | 
| diff --git a/chrome/ext/common.js b/chrome/ext/common.js | 
| index 5401aaa2885a234c537d2dcbdd4b1267e04f0660..3210849c91811e151985d0273893914d25e62965 100644 | 
| --- a/chrome/ext/common.js | 
| +++ b/chrome/ext/common.js | 
| @@ -17,33 +17,32 @@ | 
|  | 
| "use strict"; | 
|  | 
| -{ | 
| -  // Workaround since HTMLCollection and NodeList didn't have iterator support | 
| -  // before Chrome 51. | 
| -  // https://bugs.chromium.org/p/chromium/issues/detail?id=401699 | 
| -  if (!(Symbol.iterator in HTMLCollection.prototype)) | 
| -    HTMLCollection.prototype[Symbol.iterator] = Array.prototype[Symbol.iterator]; | 
| -  if (!(Symbol.iterator in NodeList.prototype)) | 
| -    NodeList.prototype[Symbol.iterator] = Array.prototype[Symbol.iterator]; | 
| +// Workaround since HTMLCollection and NodeList didn't have iterator support | 
| +// before Chrome 51. | 
| +// https://bugs.chromium.org/p/chromium/issues/detail?id=401699 | 
| +let arrayIterator = Array.prototype[Symbol.iterator]; | 
| +if (!(Symbol.iterator in HTMLCollection.prototype)) | 
| +  HTMLCollection.prototype[Symbol.iterator] = arrayIterator; | 
| +if (!(Symbol.iterator in NodeList.prototype)) | 
| +  NodeList.prototype[Symbol.iterator] = arrayIterator; | 
|  | 
| -  /* Message passing */ | 
| +/* Message passing */ | 
|  | 
| -  ext.onMessage = new ext._EventTarget(); | 
| +ext.onMessage = new ext._EventTarget(); | 
|  | 
|  | 
| -  /* Background page */ | 
| +/* Background page */ | 
|  | 
| -  ext.backgroundPage = { | 
| -    sendMessage: chrome.runtime.sendMessage, | 
| -    getWindow() | 
| -    { | 
| -      return chrome.extension.getBackgroundPage(); | 
| -    } | 
| -  }; | 
| +ext.backgroundPage = { | 
| +  sendMessage: chrome.runtime.sendMessage, | 
| +  getWindow() | 
| +  { | 
| +    return chrome.extension.getBackgroundPage(); | 
| +  } | 
| +}; | 
|  | 
|  | 
| -  /* Utils */ | 
| +/* Utils */ | 
|  | 
| -  ext.getURL = chrome.extension.getURL; | 
| -  ext.i18n = chrome.i18n; | 
| -} | 
| +ext.getURL = chrome.extension.getURL; | 
| +ext.i18n = chrome.i18n; | 
|  |