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

chrome/browser/extensions/extension_service_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/browser/extensions/extension_service_unittest.h"
 
 #include <algorithm>
 #include <set>
 #include <vector>
 
@@ skipping 521 matching lines @@
 }
 
 // static
 void ExtensionServiceTestBase::SetUpTestCase() {
   ExtensionErrorReporter::Init(false);  // no noisy errors
 }
 
 void ExtensionServiceTestBase::SetUp() {
   testing::Test::SetUp();
   ExtensionErrorReporter::GetInstance()->ClearErrors();
+  extensions::ManifestHandler::ClearRegistryForTesting();
   extensions::ManifestHandler::Register(
       keys::kDefaultLocale,
-      new extensions::DefaultLocaleHandler);
+      make_linked_ptr(new extensions::DefaultLocaleHandler));
 }
 
 class ExtensionServiceTest
   : public ExtensionServiceTestBase, public content::NotificationObserver {
  public:
   ExtensionServiceTest()
       : installed_(NULL),
         override_external_install_prompt_(
             FeatureSwitch::prompt_for_external_extensions(), false) {
     registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_LOADED,
@@ skipping 5283 matching lines @@
   EXPECT_FALSE(extensions::HasExternalInstallError(service_));
   EXPECT_FALSE(service_->IsExtensionEnabled(good_crx));
   EXPECT_TRUE(service_->IsExtensionEnabled(page_action));
 
   ExtensionPrefs* prefs = service_->extension_prefs();
   EXPECT_NE(0, prefs->GetDisableReasons(good_crx) &
       Extension::DISABLE_SIDELOAD_WIPEOUT);
   EXPECT_EQ(0, prefs->GetDisableReasons(page_action) &
       Extension::DISABLE_SIDELOAD_WIPEOUT);
 }