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

chrome/browser/extensions/api/identity/identity_api.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/api/identity/identity_api.h"
 
 #include "base/lazy_instance.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/extension_function_dispatcher.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
@@ skipping 239 matching lines @@
 }
 
 void IdentityLaunchWebAuthFlowFunction::OnAuthFlowFailure() {
   error_ = identity_constants::kInvalidRedirect;
   SendResponse(false);
   Release();  // Balanced in RunImpl.
 }
 
 IdentityAPI::IdentityAPI(Profile* profile) {
   ManifestHandler::Register(extension_manifest_keys::kOAuth2,
-                            new OAuth2ManifestHandler);
+                            make_linked_ptr(new OAuth2ManifestHandler));
 }
 
 IdentityAPI::~IdentityAPI() {
 }
 
 static base::LazyInstance<ProfileKeyedAPIFactory<IdentityAPI> >
     g_factory = LAZY_INSTANCE_INITIALIZER;
 
 // static
 ProfileKeyedAPIFactory<IdentityAPI>* IdentityAPI::GetFactoryInstance() {
   return &g_factory.Get();
 }
 
 }  // namespace extensions