Allow manifest handlers to declare keys they depend on that must be parsed before them.

chrome/common/extensions/manifest_tests/extension_manifests_ui_unittest.cc

 // 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.
 
 #include "chrome/common/extensions/manifest_tests/extension_manifest_test.h"
 
 #include "chrome/common/extensions/api/extension_action/browser_action_handler.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
 #include "chrome/common/extensions/manifest_handler.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace extensions {
 
 class UIManifestTest : public ExtensionManifestTest {
  protected:
   virtual void SetUp() OVERRIDE {
     ManifestHandler::Register(extension_manifest_keys::kBrowserAction,
-                              new BrowserActionHandler);
+                              make_linked_ptr(new BrowserActionHandler));
   }
 };
 
 TEST_F(UIManifestTest, DisallowMultipleUISurfaces) {
   LoadAndExpectError("multiple_ui_surfaces.json",
                      extension_manifest_errors::kOneUISurfaceOnly);
 }
 
 }  // namespace extensions