Move another bunch of extension API tests to manifest_version 2.

chrome/test/data/extensions/api_test/clear/one_at_a_time/background.js

+// Copyright (c) 2011 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 allTypes = {
+  cache: true,
+  cookies: true,
+  downloads: true,
+  formData: true,
+  history: true,
+  passwords: true
+};
+chrome.test.runTests([
+  function testEverything() {
+    chrome.experimental.clear.browsingData("everything", allTypes,
+        chrome.test.callbackFail(
+            'Only one \'clear\' API call can run at a time.'));
+  },
+  function testClearCache() {
+    chrome.experimental.clear.cache("everything",
+        chrome.test.callbackFail(
+            'Only one \'clear\' API call can run at a time.'));
+  },
+  function testClearCookies() {
+    chrome.experimental.clear.cookies("everything",
+        chrome.test.callbackFail(
+            'Only one \'clear\' API call can run at a time.'));
+  },
+  function testClearHistory() {
+    chrome.experimental.clear.history("everything",
+        chrome.test.callbackFail(
+            'Only one \'clear\' API call can run at a time.'));
+  },
+  function testClearPasswords() {
+    chrome.experimental.clear.passwords("everything",
+        chrome.test.callbackFail(
+            'Only one \'clear\' API call can run at a time.'));
+  },
+  function testClearDownloads() {
+    chrome.experimental.clear.downloads("everything",
+        chrome.test.callbackFail(
+            'Only one \'clear\' API call can run at a time.'));
+  },
+  function testClearFormData() {
+    chrome.experimental.clear.formData("everything",
+        chrome.test.callbackFail(
+            'Only one \'clear\' API call can run at a time.'));
+  }
+]);