Add support for a "frame" context option to chrome.contextMenus.create/update.

chrome/test/data/extensions/context_menus/frames/test.js

Index: chrome/test/data/extensions/context_menus/frames/test.js
diff --git a/chrome/test/data/extensions/context_menus/frames/test.js b/chrome/test/data/extensions/context_menus/frames/test.js
new file mode 100644
index 0000000000000000000000000000000000000000..65d65619c6fb2414341df246819820c260cb356b
--- /dev/null
+++ b/chrome/test/data/extensions/context_menus/frames/test.js
@@ -0,0 +1,19 @@
+// 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.
+
+window.onload = function() {
+  chrome.contextMenus.create(
+      {"title":"Page item", contexts: ["page"]},
+      function() {
+        if (!chrome.extension.lastError) {
+          chrome.contextMenus.create(
+          {"title":"Frame item", contexts: ["frame"]},
+          function() {
+            if (!chrome.extension.lastError) {
+              chrome.test.sendMessage("created items");
+            }
+          });
+        }
+      });
+};