Revert 127833 - Re-land alexbost's experimental offscreenTabs API.

chrome/test/data/extensions/api_test/offscreen_tabs/keyboard_events.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.
-
-var testTab = { url: 'a.html', width: 200, height: 200 };
-var testTabId;
-
-chrome.test.runTests([
-  function init() {
-    chrome.test.listenOnce(
-        chrome.experimental.offscreenTabs.onUpdated,
-        function(tabId, changeInfo, tab) {
-      assertSimilarTabs(testTab, tab);
-    });
-
-    chrome.experimental.offscreenTabs.create(testTab, pass(function(tab) {
-      assertSimilarTabs(testTab, tab);
-      testTabId = tab.id;
-    }));
-  },
-
-  // Test that keyboard events work by sending a 'q' keypress to a.html. The
-  // page has a keypress handler that will navigate the page to c.html.
-  function keyPress() {
-    chrome.test.listenOnce(
-        chrome.experimental.offscreenTabs.onUpdated,
-        function(tabId, changeInfo, tab) {
-      testTab.url = 'c.html';
-      assertEq(maybeExpandURL('c.html'), changeInfo.url);
-      assertSimilarTabs(testTab, tab);
-      assertEq(tabId, tab.id);
-      assertEq(tabId, testTabId);
-    });
-
-    chrome.experimental.offscreenTabs.sendKeyboardEvent(
-        testTabId, getKeyboardEvent(Q_KEY), pass(function() {
-      chrome.experimental.offscreenTabs.get(testTabId, pass(function(tab) {
-        assertSimilarTabs(testTab, tab);
-      }));
-    }));
-  }
-
-  // TODO(jstritar): Test event validation and edge cases.
-]);