Implement chrome.experimental.clipboard extension API.

chrome/renderer/resources/renderer_extension_bindings.js

 // Copyright (c) 2009 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.
 
 // This script contains unprivileged javascript APIs related to chrome
 // extensions.  It is loaded by any extension-related context, such as content
 // scripts or toolstrips.
 // See user_script_slave.cc for script that is loaded by content scripts only.
 // TODO(mpcomplete): we also load this in regular web pages, but don't need
 // to.
@@ skipping 228 matching lines @@
     // TODO(asargent) It would be nice to eventually generate this
     // programmatically from extension_api.json (there is already a browser test
     // that should prevent it from getting stale).
     var privileged = [
       // Entire namespaces.
       "bookmarks",
       "browserAction",
       "devtools",
       "experimental.accessibility",
       "experimental.bookmarkManager",
+      "experimental.clipboard",
       "experimental.extension",
       "experimental.idle",
       "experimental.history",
       "experimental.metrics",
       "experimental.popup",
       "experimental.processes",
       "pageAction",
       "pageActions",
       "tabs",
       "test",
       "toolstrip",
       "windows",
 
       // Functions/events/properties within the extension namespace.
       "extension.getBackgroundPage",
       "extension.getExtensionTabs",
       "extension.getToolstrips",
       "extension.getViews",
       "extension.lastError",
       "extension.onConnectExternal",
       "extension.onRequestExternal",
       "i18n.getAcceptLanguages"
     ];
     for (var i = 0; i < privileged.length; i++) {
       createStub(privileged[i]);
     }
   }
 
 })();