Revert 127146 - Add Extension Keybinding test for page actions and port the PageAction keybindings …

chrome/test/data/extensions/api_test/keybinding/page_action/background.js

-// Copyright (c) 2012 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.
-
-// Called when the user clicks on the page action.
-chrome.pageAction.onClicked.addListener(function(tab) {
-  chrome.tabs.executeScript(null, { code: "document.body.bgColor='red'" });
-});
-
-chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab) {
-  chrome.pageAction.show(tabId);
-  chrome.test.notifyPass();
-});
-
-chrome.test.notifyPass();