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

chrome/common/extensions/manifest_tests/extension_manifests_update_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/extension_manifest_constants.h"
 #include "chrome/common/extensions/manifest_handler.h"
 #include "chrome/common/extensions/manifest_tests/extension_manifest_test.h"
 #include "chrome/common/extensions/manifest_url_handler.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using extensions::Extension;
 
 namespace errors = extension_manifest_errors;
 
 class UpdateURLManifestTest : public ExtensionManifestTest {
   virtual void SetUp() OVERRIDE {
     ExtensionManifestTest::SetUp();
-    extensions::ManifestHandler::Register(extension_manifest_keys::kUpdateURL,
-                                          new extensions::UpdateURLHandler);
+    extensions::ManifestHandler::Register(
+        extension_manifest_keys::kUpdateURL,
+        make_linked_ptr(new extensions::UpdateURLHandler));
   }
 };
 
 TEST_F(UpdateURLManifestTest, UpdateUrls) {
   // Test several valid update urls
   Testcase testcases[] = {
     Testcase("update_url_valid_1.json", extensions::Manifest::INTERNAL,
              Extension::NO_FLAGS),
     Testcase("update_url_valid_2.json", extensions::Manifest::INTERNAL,
              Extension::NO_FLAGS),
@@ skipping 10 matching lines @@
     Testcase("update_url_invalid_1.json", errors::kInvalidUpdateURL,
              extensions::Manifest::INTERNAL, Extension::NO_FLAGS),
     Testcase("update_url_invalid_2.json", errors::kInvalidUpdateURL,
              extensions::Manifest::INTERNAL, Extension::NO_FLAGS),
     Testcase("update_url_invalid_3.json", errors::kInvalidUpdateURL,
              extensions::Manifest::INTERNAL, Extension::NO_FLAGS)
   };
   RunTestcases(testcases2, arraysize(testcases2),
                EXPECT_TYPE_ERROR);
 }